77996648 has 16 divisors (see below), whose sum is σ = 146484960. Its totient is φ = 38934000.

The previous prime is 77996627. The next prime is 77996671. The reversal of 77996648 is 84669977.

It is a junction number, because it is equal to n+sod(n) for n = 77996593 and 77996602.

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, 2678 + ... + 12773.

It is an arithmetic number, because the mean of its divisors is an integer number (9155310).

Almost surely, 2^77996648 is an apocalyptic number.

It is an amenable number.

77996648 is a deficient number, since it is larger than the sum of its proper divisors (68488312).

77996648 is a wasteful number, since it uses less digits than its factorization.

77996648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16088 (or 16084 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 56.

The square root of 77996648 is about 8831.5710946581. The cubic root of 77996648 is about 427.2597475898.

The spelling of 77996648 in words is "seventy-seven million, nine hundred ninety-six thousand, six hundred forty-eight".