77975948 has 6 divisors (see below), whose sum is σ = 136457916. Its totient is φ = 38987972.

The previous prime is 77975921. The next prime is 77975951. The reversal of 77975948 is 84957977.

It is a junction number, because it is equal to n+sod(n) for n = 77975893 and 77975902.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9746990 + ... + 9746997.

It is an arithmetic number, because the mean of its divisors is an integer number (22742986).

Almost surely, 2^77975948 is an apocalyptic number.

It is an amenable number.

77975948 is a deficient number, since it is larger than the sum of its proper divisors (58481968).

77975948 is a wasteful number, since it uses less digits than its factorization.

77975948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19493991 (or 19493989 counting only the distinct ones).

The product of its digits is 4445280, while the sum is 56.

The square root of 77975948 is about 8830.3990849791. The cubic root of 77975948 is about 427.2219465666.

The spelling of 77975948 in words is "seventy-seven million, nine hundred seventy-five thousand, nine hundred forty-eight".