513638118 has 32 divisors (see below), whose sum is σ = 1304478720. Its totient is φ = 146753640.

The previous prime is 513638089. The next prime is 513638131. The reversal of 513638118 is 811836315.

513638118 is a `hidden beast` number, since 5 + 1 + 3 + 638 + 1 + 18 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 679038 + ... + 679793.

It is an arithmetic number, because the mean of its divisors is an integer number (40764960).

Almost surely, 2^513638118 is an apocalyptic number.

513638118 is an abundant number, since it is smaller than the sum of its proper divisors (790840602).

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

513638118 is a wasteful number, since it uses less digits than its factorization.

513638118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358849 (or 1358843 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 513638118 is about 22663.5857268880. The cubic root of 513638118 is about 800.8522781633.

The spelling of 513638118 in words is "five hundred thirteen million, six hundred thirty-eight thousand, one hundred eighteen".