91680648 has 32 divisors (see below), whose sum is σ = 230376960. Its totient is φ = 30403520.

The previous prime is 91680613. The next prime is 91680653. The reversal of 91680648 is 84608619.

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, 4968 + ... + 14423.

It is an arithmetic number, because the mean of its divisors is an integer number (7199280).

Almost surely, 2^91680648 is an apocalyptic number.

It is an amenable number.

91680648 is an abundant number, since it is smaller than the sum of its proper divisors (138696312).

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

91680648 is a wasteful number, since it uses less digits than its factorization.

91680648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19597 (or 19593 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 91680648 is about 9575.0012010443. The cubic root of 91680648 is about 450.9127941214.

The spelling of 91680648 in words is "ninety-one million, six hundred eighty thousand, six hundred forty-eight".