78995916 has 36 divisors (see below), whose sum is σ = 200082792. Its totient is φ = 26279424.

The previous prime is 78995857. The next prime is 78995921. The reversal of 78995916 is 61959987.

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 18871 + ... + 22673.

Almost surely, 2^78995916 is an apocalyptic number.

It is an amenable number.

78995916 is an abundant number, since it is smaller than the sum of its proper divisors (121086876).

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

78995916 is a wasteful number, since it uses less digits than its factorization.

78995916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4390 (or 4385 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 54.

The square root of 78995916 is about 8887.9646713969. The cubic root of 78995916 is about 429.0766485700.

The spelling of 78995916 in words is "seventy-eight million, nine hundred ninety-five thousand, nine hundred sixteen".