91923680 has 96 divisors (see below), whose sum is σ = 229920768. Its totient is φ = 34675200.

The previous prime is 91923673. The next prime is 91923683. The reversal of 91923680 is 8632919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91923683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213065 + ... + 213495.

It is an arithmetic number, because the mean of its divisors is an integer number (2395008).

Almost surely, 2^91923680 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 91923680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114960384).

91923680 is an abundant number, since it is smaller than the sum of its proper divisors (137997088).

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

91923680 is a wasteful number, since it uses less digits than its factorization.

91923680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520 (or 512 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 91923680 is about 9587.6837661658. The cubic root of 91923680 is about 451.3108772159.

The spelling of 91923680 in words is "ninety-one million, nine hundred twenty-three thousand, six hundred eighty".