79986456 has 96 divisors (see below), whose sum is σ = 246654720. Its totient is φ = 23179200.

The previous prime is 79986451. The next prime is 79986469. The reversal of 79986456 is 65468997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79986451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16021 + ... + 20411.

It is an arithmetic number, because the mean of its divisors is an integer number (2569320).

Almost surely, 2^79986456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79986456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123327360).

79986456 is an abundant number, since it is smaller than the sum of its proper divisors (166668264).

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

79986456 is a wasteful number, since it uses less digits than its factorization.

79986456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4437 (or 4430 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 79986456 is about 8943.5147453336. The cubic root of 79986456 is about 430.8626202478.

The spelling of 79986456 in words is "seventy-nine million, nine hundred eighty-six thousand, four hundred fifty-six".