91922880 has 112 divisors (see below), whose sum is σ = 333573120. Its totient is φ = 21009408.

The previous prime is 91922867. The next prime is 91922891. The reversal of 91922880 is 8822919.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

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, 120 + ... + 13559.

Almost surely, 2^91922880 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 91922880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166786560).

91922880 is an abundant number, since it is smaller than the sum of its proper divisors (241650240).

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

91922880 is a wasteful number, since it uses less digits than its factorization.

91922880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13706 (or 13696 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 91922880 is about 9587.6420458839. The cubic root of 91922880 is about 451.3095679785.

Adding to 91922880 its sum of digits (39), we get a palindrome (91922919).

The spelling of 91922880 in words is "ninety-one million, nine hundred twenty-two thousand, eight hundred eighty".