91923660 has 120 divisors (see below), whose sum is σ = 290893680. Its totient is φ = 24299136.

The previous prime is 91923659. The next prime is 91923673. The reversal of 91923660 is 6632919.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 289822 + ... + 290138.

It is an arithmetic number, because the mean of its divisors is an integer number (2424114).

Almost surely, 2^91923660 is an apocalyptic number.

91923660 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91923660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145446840).

91923660 is an abundant number, since it is smaller than the sum of its proper divisors (198970020).

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

91923660 is a wasteful number, since it uses less digits than its factorization.

91923660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517 (or 506 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 91923660 is about 9587.6827231610. The cubic root of 91923660 is about 451.3108444850.

The spelling of 91923660 in words is "ninety-one million, nine hundred twenty-three thousand, six hundred sixty".