91445088 has 96 divisors (see below), whose sum is σ = 281111040. Its totient is φ = 25482240.

The previous prime is 91445069. The next prime is 91445111. The reversal of 91445088 is 88054419.

It is a tau number, because it is divible by the number of its divisors (96).

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, 25893 + ... + 29211.

It is an arithmetic number, because the mean of its divisors is an integer number (2928240).

Almost surely, 2^91445088 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 91445088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140555520).

91445088 is an abundant number, since it is smaller than the sum of its proper divisors (189665952).

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

91445088 is a wasteful number, since it uses less digits than its factorization.

91445088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3380 (or 3372 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 91445088 is about 9562.6925078662. The cubic root of 91445088 is about 450.5262781014.

The spelling of 91445088 in words is "ninety-one million, four hundred forty-five thousand, eighty-eight".