79688642 has 16 divisors (see below), whose sum is σ = 131868000. Its totient is φ = 35814240.

The previous prime is 79688611. The next prime is 79688657. The reversal of 79688642 is 24688697.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18392 + ... + 22307.

It is an arithmetic number, because the mean of its divisors is an integer number (8241750).

Almost surely, 2^79688642 is an apocalyptic number.

79688642 is a deficient number, since it is larger than the sum of its proper divisors (52179358).

79688642 is a wasteful number, since it uses less digits than its factorization.

79688642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40801.

The product of its digits is 1161216, while the sum is 50.

The square root of 79688642 is about 8926.8495002436. The cubic root of 79688642 is about 430.3272108322.

Subtracting from 79688642 its reverse (24688697), we obtain a palindrome (54999945).

The spelling of 79688642 in words is "seventy-nine million, six hundred eighty-eight thousand, six hundred forty-two".