78965388 has 48 divisors (see below), whose sum is σ = 205470720. Its totient is φ = 26226000.

The previous prime is 78965317. The next prime is 78965399. The reversal of 78965388 is 88356987.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 32413 + ... + 34763.

It is an arithmetic number, because the mean of its divisors is an integer number (4280640).

Almost surely, 2^78965388 is an apocalyptic number.

It is an amenable number.

78965388 is an abundant number, since it is smaller than the sum of its proper divisors (126505332).

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

78965388 is a wasteful number, since it uses less digits than its factorization.

78965388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2675 (or 2667 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 78965388 is about 8886.2471268810. The cubic root of 78965388 is about 429.0213691737.

The spelling of 78965388 in words is "seventy-eight million, nine hundred sixty-five thousand, three hundred eighty-eight".