| Base | Representation |
|---|---|
| bin | 11111000010010… |
| … | …000011001110100 |
| 3 | 1100021202112210000 |
| 4 | 133002100121310 |
| 5 | 2031243411142 |
| 6 | 123400031300 |
| 7 | 15621515400 |
| oct | 3702203164 |
| 9 | 1307675700 |
| 10 | 520685172 |
| 11 | 247a05527 |
| 12 | 126462530 |
| 13 | 83b48347 |
| 14 | 4d21c100 |
| 15 | 30aa214c |
| hex | 1f090674 |
520685172 has 90 divisors (see below), whose sum is σ = 1583454642. Its totient is φ = 148762656.
The previous prime is 520685171. The next prime is 520685173. The reversal of 520685172 is 271586025.
It is a happy number.
520685172 is a `hidden beast` number, since 520 + 68 + 5 + 1 + 72 = 666.
It is an interprime number because it is at equal distance from previous prime (520685171) and next prime (520685173).
It can be written as a sum of positive squares in only one way, i.e., 520113636 + 571536 = 22806^2 + 756^2 .
It is a super-2 number, since 2×5206851722 = 542226096681339168, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (520685171) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 523 + ... + 32274.
Almost surely, 2520685172 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 520685172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (791727321).
520685172 is an abundant number, since it is smaller than the sum of its proper divisors (1062769470).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
520685172 is a wasteful number, since it uses less digits than its factorization.
520685172 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 32827 (or 32809 counting only the distinct ones).
The product of its (nonzero) digits is 33600, while the sum is 36.
The square root of 520685172 is about 22818.5269463215. The cubic root of 520685172 is about 804.4981875655.
The spelling of 520685172 in words is "five hundred twenty million, six hundred eighty-five thousand, one hundred seventy-two".
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