79220138 has 8 divisors (see below), whose sum is σ = 118868580. Its totient is φ = 39597280.

The previous prime is 79220129. The next prime is 79220179. The reversal of 79220138 is 83102297.

It can be written as a sum of positive squares in 2 ways, for example, as 79085449 + 134689 = 8893^2 + 367^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6758 + ... + 14286.

Almost surely, 2^79220138 is an apocalyptic number.

79220138 is a deficient number, since it is larger than the sum of its proper divisors (39648442).

79220138 is a wasteful number, since it uses less digits than its factorization.

79220138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12792.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 79220138 is about 8900.5695323389. The cubic root of 79220138 is about 429.4822287841.

The spelling of 79220138 in words is "seventy-nine million, two hundred twenty thousand, one hundred thirty-eight".