77312648 has 32 divisors (see below), whose sum is σ = 166181760. Its totient is φ = 33031680.

The previous prime is 77312633. The next prime is 77312657. The reversal of 77312648 is 84621377.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17813 + ... + 21723.

It is an arithmetic number, because the mean of its divisors is an integer number (5193180).

Almost surely, 2^77312648 is an apocalyptic number.

It is an amenable number.

77312648 is an abundant number, since it is smaller than the sum of its proper divisors (88869112).

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

77312648 is a wasteful number, since it uses less digits than its factorization.

77312648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4277 (or 4273 counting only the distinct ones).

The product of its digits is 56448, while the sum is 38.

The square root of 77312648 is about 8792.7611135524. The cubic root of 77312648 is about 426.0071119328.

The spelling of 77312648 in words is "seventy-seven million, three hundred twelve thousand, six hundred forty-eight".