91893880 has 128 divisors (see below), whose sum is σ = 239500800. Its totient is φ = 31449600.

The previous prime is 91893871. The next prime is 91893931. The reversal of 91893880 is 8839819.

It is a self number, because there is not a number n which added to its sum of digits gives 91893880.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 701415 + ... + 701545.

It is an arithmetic number, because the mean of its divisors is an integer number (1871100).

Almost surely, 2^91893880 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 91893880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119750400).

91893880 is an abundant number, since it is smaller than the sum of its proper divisors (147606920).

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

91893880 is a wasteful number, since it uses less digits than its factorization.

91893880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 46.

The square root of 91893880 is about 9586.1295630718. The cubic root of 91893880 is about 451.2621029946.

The spelling of 91893880 in words is "ninety-one million, eight hundred ninety-three thousand, eight hundred eighty".