520397578 has 16 divisors (see below), whose sum is σ = 785453760. Its totient is φ = 258584416.

The previous prime is 520397561. The next prime is 520397623. The reversal of 520397578 is 875793025.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 412713 + ... + 413971.

It is an arithmetic number, because the mean of its divisors is an integer number (49090860).

Almost surely, 2^520397578 is an apocalyptic number.

520397578 is a deficient number, since it is larger than the sum of its proper divisors (265056182).

520397578 is a wasteful number, since it uses less digits than its factorization.

520397578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2381.

The product of its (nonzero) digits is 529200, while the sum is 46.

The square root of 520397578 is about 22812.2243106629. The cubic root of 520397578 is about 804.3500420864.

The spelling of 520397578 in words is "five hundred twenty million, three hundred ninety-seven thousand, five hundred seventy-eight".