79457218 has 16 divisors (see below), whose sum is σ = 126733464. Its totient is φ = 37232640.

The previous prime is 79457207. The next prime is 79457227. The reversal of 79457218 is 81275497.

It can be written as a sum of positive squares in 4 ways, for example, as 71351809 + 8105409 = 8447^2 + 2847^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3346 + ... + 13042.

Almost surely, 2^79457218 is an apocalyptic number.

79457218 is a deficient number, since it is larger than the sum of its proper divisors (47276246).

79457218 is a wasteful number, since it uses less digits than its factorization.

79457218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9957.

The product of its digits is 141120, while the sum is 43.

The square root of 79457218 is about 8913.8778317857. The cubic root of 79457218 is about 429.9102354540.

The spelling of 79457218 in words is "seventy-nine million, four hundred fifty-seven thousand, two hundred eighteen".