520668040 has 32 divisors (see below), whose sum is σ = 1178064000. Its totient is φ = 207100864.

The previous prime is 520668023. The next prime is 520668041. The reversal of 520668040 is 40866025.

520668040 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 520667993 and 520668011.

It is not an unprimeable number, because it can be changed into a prime (520668041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29200 + ... + 43519.

It is an arithmetic number, because the mean of its divisors is an integer number (36814500).

Almost surely, 2^520668040 is an apocalyptic number.

It is an amenable number.

520668040 is an abundant number, since it is smaller than the sum of its proper divisors (657395960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

520668040 is a wasteful number, since it uses less digits than its factorization.

520668040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72909 (or 72905 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 520668040 is about 22818.1515465210. The cubic root of 520668040 is about 804.4893640544.

It can be divided in two parts, 52066 and 8040, that added together give a palindrome (60106).

The spelling of 520668040 in words is "five hundred twenty million, six hundred sixty-eight thousand, forty".