91927680 has 256 divisors, whose sum is σ = 329011200. Its totient is φ = 21676032.

The previous prime is 91927673. The next prime is 91927697. The reversal of 91927680 is 8672919.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 723777 + ... + 723903.

It is an arithmetic number, because the mean of its divisors is an integer number (1285200).

Almost surely, 2^91927680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91927680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164505600).

91927680 is an abundant number, since it is smaller than the sum of its proper divisors (237083520).

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

91927680 is a wasteful number, since it uses less digits than its factorization.

91927680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 91927680 is about 9587.8923648527. The cubic root of 91927680 is about 451.3174232887.

The spelling of 91927680 in words is "ninety-one million, nine hundred twenty-seven thousand, six hundred eighty".