520918029 has 24 divisors (see below), whose sum is σ = 797721912. Its totient is φ = 326430720.

The previous prime is 520918009. The next prime is 520918067. The reversal of 520918029 is 920819025.

It can be written as a sum of positive squares in 4 ways, for example, as 45765225 + 475152804 = 6765^2 + 21798^2 .

It is not a de Polignac number, because 520918029 - 2⁸ = 520917773 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 520917984 and 520918002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520918009) 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 23 ways as a sum of consecutive naturals, for example, 153309 + ... + 156669.

It is an arithmetic number, because the mean of its divisors is an integer number (33238413).

Almost surely, 2^520918029 is an apocalyptic number.

It is an amenable number.

520918029 is a deficient number, since it is larger than the sum of its proper divisors (276803883).

520918029 is a wasteful number, since it uses less digits than its factorization.

520918029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4397 (or 4394 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 520918029 is about 22823.6287430373. The cubic root of 520918029 is about 804.6180969500.

The spelling of 520918029 in words is "five hundred twenty million, nine hundred eighteen thousand, twenty-nine".