79686436 has 12 divisors (see below), whose sum is σ = 139532400. Its totient is φ = 39820040.

The previous prime is 79686433. The next prime is 79686443. The reversal of 79686436 is 63468697.

It is a self number, because there is not a number n which added to its sum of digits gives 79686436.

It is not an unprimeable number, because it can be changed into a prime (79686433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3651 + ... + 13141.

It is an arithmetic number, because the mean of its divisors is an integer number (11627700).

Almost surely, 2^79686436 is an apocalyptic number.

It is an amenable number.

79686436 is a deficient number, since it is larger than the sum of its proper divisors (59845964).

79686436 is a wasteful number, since it uses less digits than its factorization.

79686436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11594 (or 11592 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 49.

The square root of 79686436 is about 8926.7259395593. The cubic root of 79686436 is about 430.3232399167.

The spelling of 79686436 in words is "seventy-nine million, six hundred eighty-six thousand, four hundred thirty-six".