518749904 has 20 divisors (see below), whose sum is σ = 1026464064. Its totient is φ = 253855968.

The previous prime is 518749871. The next prime is 518749919. The reversal of 518749904 is 409947815.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344162 + ... + 345665.

Almost surely, 2^518749904 is an apocalyptic number.

It is an amenable number.

518749904 is a deficient number, since it is larger than the sum of its proper divisors (507714160).

518749904 is a wasteful number, since it uses less digits than its factorization.

518749904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689882 (or 689876 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 518749904 is about 22776.0818403869. The cubic root of 518749904 is about 803.5002380814.

The spelling of 518749904 in words is "five hundred eighteen million, seven hundred forty-nine thousand, nine hundred four".