520370985 has 16 divisors (see below), whose sum is σ = 841950720. Its totient is φ = 274412160.

The previous prime is 520370971. The next prime is 520370987. The reversal of 520370985 is 589073025.

It is not a de Polignac number, because 520370985 - 2¹³ = 520362793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (520370987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193561 + ... + 196230.

It is an arithmetic number, because the mean of its divisors is an integer number (52621920).

Almost surely, 2^520370985 is an apocalyptic number.

It is an amenable number.

520370985 is a deficient number, since it is larger than the sum of its proper divisors (321579735).

520370985 is a wasteful number, since it uses less digits than its factorization.

520370985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389888.

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 520370985 is about 22811.6414358985. The cubic root of 520370985 is about 804.3363407384.

The spelling of 520370985 in words is "five hundred twenty million, three hundred seventy thousand, nine hundred eighty-five".