79978144 has 24 divisors (see below), whose sum is σ = 165745440. Its totient is φ = 37884096.

The previous prime is 79978141. The next prime is 79978169. The reversal of 79978144 is 44187997.

It is not an unprimeable number, because it can be changed into a prime (79978141) 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, 65164 + ... + 66379.

It is an arithmetic number, because the mean of its divisors is an integer number (6906060).

Almost surely, 2^79978144 is an apocalyptic number.

It is an amenable number.

79978144 is an abundant number, since it is smaller than the sum of its proper divisors (85767296).

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

79978144 is a wasteful number, since it uses less digits than its factorization.

79978144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131572 (or 131564 counting only the distinct ones).

The product of its digits is 508032, while the sum is 49.

The square root of 79978144 is about 8943.0500389968. The cubic root of 79978144 is about 430.8476949953.

The spelling of 79978144 in words is "seventy-nine million, nine hundred seventy-eight thousand, one hundred forty-four".