78976644 has 12 divisors (see below), whose sum is σ = 184278864. Its totient is φ = 26325544.

The previous prime is 78976643. The next prime is 78976669. The reversal of 78976644 is 44667987.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (78976643) by changing a digit.

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, 3290682 + ... + 3290705.

It is an arithmetic number, because the mean of its divisors is an integer number (15356572).

Almost surely, 2^78976644 is an apocalyptic number.

It is an amenable number.

78976644 is an abundant number, since it is smaller than the sum of its proper divisors (105302220).

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

78976644 is a wasteful number, since it uses less digits than its factorization.

78976644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6581394 (or 6581392 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 51.

The square root of 78976644 is about 8886.8804425400. The cubic root of 78976644 is about 429.0417529360.

It can be divided in two parts, 7897 and 6644, that added together give a palindrome (14541).

The spelling of 78976644 in words is "seventy-eight million, nine hundred seventy-six thousand, six hundred forty-four".