91889456 has 40 divisors (see below), whose sum is σ = 184809600. Its totient is φ = 44213760.

The previous prime is 91889449. The next prime is 91889459. The reversal of 91889456 is 65498819.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (91889459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113180 + ... + 113988.

It is an arithmetic number, because the mean of its divisors is an integer number (4620240).

Almost surely, 2^91889456 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 91889456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92404800).

91889456 is an abundant number, since it is smaller than the sum of its proper divisors (92920144).

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

91889456 is a wasteful number, since it uses less digits than its factorization.

91889456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077 (or 1071 counting only the distinct ones).

The product of its digits is 622080, while the sum is 50.

The square root of 91889456 is about 9585.8988102316. The cubic root of 91889456 is about 451.2548612516.

The spelling of 91889456 in words is "ninety-one million, eight hundred eighty-nine thousand, four hundred fifty-six".