520393239 has 24 divisors (see below), whose sum is σ = 830505312. Its totient is φ = 312322560.

The previous prime is 520393231. The next prime is 520393241. The reversal of 520393239 is 932393025.

It is not a de Polignac number, because 520393239 - 2³ = 520393231 is a prime.

It is a super-2 number, since 2×520393239² = 541618246393822242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520393231) 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, 70422 + ... + 77459.

It is an arithmetic number, because the mean of its divisors is an integer number (34604388).

Almost surely, 2^520393239 is an apocalyptic number.

520393239 is a deficient number, since it is larger than the sum of its proper divisors (310112073).

520393239 is a wasteful number, since it uses less digits than its factorization.

520393239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147927 (or 147924 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 36.

The square root of 520393239 is about 22812.1292079455. The cubic root of 520393239 is about 804.3478065620.

It can be divided in two parts, 52039 and 3239, that added together give a triangular number (55278 = T₃₃₂).

The spelling of 520393239 in words is "five hundred twenty million, three hundred ninety-three thousand, two hundred thirty-nine".