520386408 has 48 divisors (see below), whose sum is σ = 1470661920. Its totient is φ = 165919776.

The previous prime is 520386401. The next prime is 520386443. The reversal of 520386408 is 804683025.

520386408 is a `hidden beast` number, since 5 + 2 + 0 + 3 + 8 + 640 + 8 = 666.

It is a super-2 number, since 2×520386408² = 541604027262284928, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (520386401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 155466 + ... + 158777.

It is an arithmetic number, because the mean of its divisors is an integer number (30638790).

Almost surely, 2^520386408 is an apocalyptic number.

It is an amenable number.

520386408 is an abundant number, since it is smaller than the sum of its proper divisors (950275512).

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

520386408 is a wasteful number, since it uses less digits than its factorization.

520386408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314278 (or 314271 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 520386408 is about 22811.9794844726. The cubic root of 520386408 is about 804.3442870928.

The spelling of 520386408 in words is "five hundred twenty million, three hundred eighty-six thousand, four hundred eight".