91945504 has 48 divisors (see below), whose sum is σ = 213566976. Its totient is φ = 38131200.

The previous prime is 91945499. The next prime is 91945519. The reversal of 91945504 is 40554919.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324 + ... + 13564.

It is an arithmetic number, because the mean of its divisors is an integer number (4449312).

Almost surely, 2^91945504 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 91945504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106783488).

91945504 is an abundant number, since it is smaller than the sum of its proper divisors (121621472).

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

91945504 is a wasteful number, since it uses less digits than its factorization.

91945504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13289 (or 13281 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 91945504 is about 9588.8218254382. The cubic root of 91945504 is about 451.3465902814.

The spelling of 91945504 in words is "ninety-one million, nine hundred forty-five thousand, five hundred four".