79681984 has 28 divisors (see below), whose sum is σ = 158611824. Its totient is φ = 39716864.

The previous prime is 79681981. The next prime is 79681993. The reversal of 79681984 is 48918697.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79681981) 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, 20829 + ... + 24355.

It is an arithmetic number, because the mean of its divisors is an integer number (5664708).

Almost surely, 2^79681984 is an apocalyptic number.

It is an amenable number.

79681984 is a deficient number, since it is larger than the sum of its proper divisors (78929840).

79681984 is a wasteful number, since it uses less digits than its factorization.

79681984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3892 (or 3882 counting only the distinct ones).

The product of its digits is 870912, while the sum is 52.

The square root of 79681984 is about 8926.4765725341. The cubic root of 79681984 is about 430.3152258605.

The spelling of 79681984 in words is "seventy-nine million, six hundred eighty-one thousand, nine hundred eighty-four".