Math question: What is the sum of the digits of the number obtained by squaring 40?

To find the number obtained by squaring 40, we multiply it by itself: 40 × 40 = 1600. The sum of the digits in this number is 1 + 6 + 0 + 0 = 7. So, the answer is 7.

Math question: What is the sum of the first 20 positive integers, multiplied by 2, minus the square root of 625, divided by 5, plus 10?

The sum of the first 20 positive integers can be calculated using the formula n*(n+1)/2, where n is the total number of terms. Thus, 20*(20+1)/2 = 210. Multiplying this by 2 gives 420. The square root of 625 is 25, and dividing it by 5 yields 5. Finally, adding 10 gives an answer of 425. Therefore, the final answer is 425.

Math question: What is the sum of the prime numbers between 40 and 200?

To find the sum of prime numbers between 40 and 200, we need to identify all the prime numbers within this range and add them together. The prime numbers in this range are 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, and 193. Adding all these numbers, we get the sum as 3,314. Therefore, the sum of prime numbers between 40 and 200 is 3,314.

Max	9223372036854775807
25835	Positive integer
0b10001100	Binary number
01771452	Octal number
0x129abf	Hex number
5.012 * 10^7	Scientific notation
2^4 * 5	Factorized form
*	Random number

40 (number)

40 is an even 2-digits composite number following 39 and preceding 41. In scientific notation, it is written as 4.0 × 10^1. The sum of its digits is 4. It has a total of 4 prime factors and 8 positive divisors. There are 16 positive integers (up to 40) that are relatively prime to 40.

Interesting facts

40 has 8 divisors, whose sum is 90
The reverse of 40 is 04
Previous prime number is 2

Basic properties

Is Prime? no
Number parity even
Number length 2
Sum of Digits 4
Digital Root 4

Name

Name	forty

Notation

Scientific notation	4.0 × 10^1
Engineering notation	4.0 × 10^0

Prime Factorization of 40

Prime Factorization 2 × 2 × 2 × 5

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	4	Total number of prime factors
rad	Radical	10	Product of the distinct prime numbers

The prime factorization of 40 is 2 × 2 × 2 × 5. Since it has a total of 4 prime factors.

Most popular turbo-numbers

5, 8, 81, 22, 311, 498, 177, 9075, 14468, 69012, 111018, 250650, 6376252, 4708471, 78837232, 383968, 572556653, 490481884, 7330358081, 9330687487

Basic calculations (n = 40)

Multiplication

n×y

n×2	80
n×3	120
n×4	160
n×5	200

Division

n÷y

n÷2	20
n÷3	13.333333333333
n÷3	10
n÷5	8

Exponentiation

n^y

n²	1600
n³	64000
n⁴	2560000
n⁵	102400000

Nth Root

^y√n

²√n	6.3245553203368
³√n	3.4199518933534
⁴√n	2.5148668593659
⁵√n	2.0912791051825

Divisors of 40

1, 2, 4, 5, 8, 10, 20, 40

8 divisors

τ	Total Divisors	8	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-39	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.125	Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G	Geometric Mean	1	Returns the nth root of the product of n divisors
H	Harmonic Mean	8	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 40 can be divided by 8 positive divisors. The sum of these divisors (counting 40) is 1, the average is 0.125.

Base conversion 40

Base	System	Value
2	Binary	101000
3	Ternary	1111
4	Quaternary	220
5	Quinary	130
6	Senary	104
8	Octal	50
10	Decimal	40
12	Duodecimal	34
16	Hexadecimal	28
20	Vigesimal	20
36	Base36	14

Cryptographic Hash Functions

md5	d645920e395fedad7bbbed0eca3fe2e0
sha1	af3e133428b9e25c55bc59fe534248e6a0c0f17b
sha256	d59eced1ded07f84c145592f65bdf854358e009c5cd705f5215bf18697fed103
sha512	5e108bc2842d7716815913af0b3d5cb59563fa9116f71b9a17b37d6d445fe778a071b6abcf9b1c5bac2be00800c74e29d69774a66570908d5ea848dcc0abfa76
ripemd-160	ccdd6dad7cfa024a9ee742d9ea7f2c9c83dffacd

40 as geometric shapes

Circle

Radius = n

Diameter	80
Circumference	251.32741228718
Area	5026.5482457437

Sphere

Radius = n

Volume	268082.57310633
Surface area	20106.192982975
Circumference	251.32741228718

Square

Length = n

Perimeter	160
Area	1600
Diagonal	56.568542494924

Cube

Length = n

Surface area	9600
Volume	64000
Space diagonal	69.282032302755

Equilateral Triangle

Length = n

Perimeter	120
Area	692.82032302755
Altitude	34.641016151378

Triangular Pyramid

Length = n

Surface area	692.82032302755
Volume	7542.4723326565
Height	18.856180831641