91881024 has 112 divisors (see below), whose sum is σ = 257495040. Its totient is φ = 28869120.

The previous prime is 91881001. The next prime is 91881059. The reversal of 91881024 is 42018819.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255757 + ... + 256115.

Almost surely, 2^91881024 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 91881024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128747520).

91881024 is an abundant number, since it is smaller than the sum of its proper divisors (165614016).

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

91881024 is a wasteful number, since it uses less digits than its factorization.

91881024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448 (or 438 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 91881024 is about 9585.4589874455. The cubic root of 91881024 is about 451.2410580815.

The spelling of 91881024 in words is "ninety-one million, eight hundred eighty-one thousand, twenty-four".