520207040 has 28 divisors (see below), whose sum is σ = 1238743776. Its totient is φ = 208082688.

The previous prime is 520207033. The next prime is 520207073. The reversal of 520207040 is 40702025.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 812504 + ... + 813143.

Almost surely, 2^520207040 is an apocalyptic number.

It is an amenable number.

520207040 is an abundant number, since it is smaller than the sum of its proper divisors (718536736).

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

520207040 is a wasteful number, since it uses less digits than its factorization.

520207040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1625664 (or 1625654 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 520207040 is about 22808.0477025106. The cubic root of 520207040 is about 804.2518620517.

Adding to 520207040 its reverse (40702025), we get a palindrome (560909065).

The spelling of 520207040 in words is "five hundred twenty million, two hundred seven thousand, forty".