518921808 has 40 divisors (see below), whose sum is σ = 1341580800. Its totient is φ = 172840704.

The previous prime is 518921801. The next prime is 518921827. The reversal of 518921808 is 808129815.

It is a self number, because there is not a number n which added to its sum of digits gives 518921808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518921801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73873 + ... + 80591.

It is an arithmetic number, because the mean of its divisors is an integer number (33539520).

Almost surely, 2^518921808 is an apocalyptic number.

It is an amenable number.

518921808 is an abundant number, since it is smaller than the sum of its proper divisors (822658992).

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

518921808 is a wasteful number, since it uses less digits than its factorization.

518921808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8339 (or 8333 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 42.

The square root of 518921808 is about 22779.8553112174. The cubic root of 518921808 is about 803.5889832547.

The spelling of 518921808 in words is "five hundred eighteen million, nine hundred twenty-one thousand, eight hundred eight".