520457808 has 120 divisors (see below), whose sum is σ = 1475343072. Its totient is φ = 158006784.

The previous prime is 520457783. The next prime is 520457843. The reversal of 520457808 is 808754025.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 672910 + ... + 673682.

Almost surely, 2^520457808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520457808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (737671536).

520457808 is an abundant number, since it is smaller than the sum of its proper divisors (954885264).

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

520457808 is a wasteful number, since it uses less digits than its factorization.

520457808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893 (or 874 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 39.

The square root of 520457808 is about 22813.5443980106. The cubic root of 520457808 is about 804.3810722937.

The spelling of 520457808 in words is "five hundred twenty million, four hundred fifty-seven thousand, eight hundred eight".