79870842 has 24 divisors (see below), whose sum is σ = 173504916. Its totient is φ = 26554176.

The previous prime is 79870799. The next prime is 79870853. The reversal of 79870842 is 24807897.

It can be written as a sum of positive squares in 2 ways, for example, as 72948681 + 6922161 = 8541^2 + 2631^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1558 + ... + 12734.

Almost surely, 2^79870842 is an apocalyptic number.

79870842 is an abundant number, since it is smaller than the sum of its proper divisors (93634074).

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

79870842 is a wasteful number, since it uses less digits than its factorization.

79870842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11582 (or 11579 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 79870842 is about 8937.0488417598. The cubic root of 79870842 is about 430.6549277069.

The spelling of 79870842 in words is "seventy-nine million, eight hundred seventy thousand, eight hundred forty-two".