77860928 has 14 divisors (see below), whose sum is σ = 154505406. Its totient is φ = 38930432.

The previous prime is 77860919. The next prime is 77860931. The reversal of 77860928 is 82906877.

It can be written as a sum of positive squares in only one way, i.e., 45050944 + 32809984 = 6712^2 + 5728^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608225 + ... + 608352.

Almost surely, 2^77860928 is an apocalyptic number.

It is an amenable number.

77860928 is a deficient number, since it is larger than the sum of its proper divisors (76644478).

77860928 is a wasteful number, since it uses less digits than its factorization.

77860928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216589 (or 1216579 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 77860928 is about 8823.8839520928. The cubic root of 77860928 is about 427.0117824046.

The spelling of 77860928 in words is "seventy-seven million, eight hundred sixty thousand, nine hundred twenty-eight".