79711638 has 8 divisors (see below), whose sum is σ = 159423288. Its totient is φ = 26570544.

The previous prime is 79711627. The next prime is 79711649. The reversal of 79711638 is 83611797.

It is an interprime number because it is at equal distance from previous prime (79711627) and next prime (79711649).

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

79711638 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 79711638.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6642631 + ... + 6642642.

It is an arithmetic number, because the mean of its divisors is an integer number (19927911).

Almost surely, 2^79711638 is an apocalyptic number.

79711638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

79711638 is a wasteful number, since it uses less digits than its factorization.

79711638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13285278.

The product of its digits is 63504, while the sum is 42.

The square root of 79711638 is about 8928.1374317379. The cubic root of 79711638 is about 430.3686004730.

The spelling of 79711638 in words is "seventy-nine million, seven hundred eleven thousand, six hundred thirty-eight".