78890992 has 20 divisors (see below), whose sum is σ = 153272680. Its totient is φ = 39336768.

The previous prime is 78890971. The next prime is 78891013. The reversal of 78890992 is 29909887.

It is an interprime number because it is at equal distance from previous prime (78890971) and next prime (78891013).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642 + ... + 12577.

It is an arithmetic number, because the mean of its divisors is an integer number (7663634).

Almost surely, 2^78890992 is an apocalyptic number.

It is an amenable number.

78890992 is a deficient number, since it is larger than the sum of its proper divisors (74381688).

78890992 is a wasteful number, since it uses less digits than its factorization.

78890992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13600 (or 13594 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 52.

The square root of 78890992 is about 8882.0601213908. The cubic root of 78890992 is about 428.8865949249.

The spelling of 78890992 in words is "seventy-eight million, eight hundred ninety thousand, nine hundred ninety-two".