78972308 has 24 divisors (see below), whose sum is σ = 141048264. Its totient is φ = 38678400.

The previous prime is 78972301. The next prime is 78972329. The reversal of 78972308 is 80327987.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1567504 + 77404804 = 1252^2 + 8798^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78972301) 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 7 ways as a sum of consecutive naturals, for example, 76838 + ... + 77858.

It is an arithmetic number, because the mean of its divisors is an integer number (5877011).

Almost surely, 2^78972308 is an apocalyptic number.

It is an amenable number.

78972308 is a deficient number, since it is larger than the sum of its proper divisors (62075956).

78972308 is a wasteful number, since it uses less digits than its factorization.

78972308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1403 (or 1401 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 78972308 is about 8886.6364840698. The cubic root of 78972308 is about 429.0339009982.

The spelling of 78972308 in words is "seventy-eight million, nine hundred seventy-two thousand, three hundred eight".