518812740 has 72 divisors (see below), whose sum is σ = 1575614040. Its totient is φ = 138184704.

The previous prime is 518812739. The next prime is 518812753. The reversal of 518812740 is 47218815.

518812740 is a `hidden beast` number, since 518 + 81 + 27 + 40 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 32080896 + 486731844 = 5664^2 + 22062^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a junction number, because it is equal to n+sod(n) for n = 518812695 and 518812704.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 256212 + ... + 258228.

Almost surely, 2^518812740 is an apocalyptic number.

It is an amenable number.

518812740 is an abundant number, since it is smaller than the sum of its proper divisors (1056801300).

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

518812740 is a wasteful number, since it uses less digits than its factorization.

518812740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3461 (or 3456 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 518812740 is about 22777.4612281527. The cubic root of 518812740 is about 803.5326793421.

The spelling of 518812740 in words is "five hundred eighteen million, eight hundred twelve thousand, seven hundred forty".