91441856 has 56 divisors (see below), whose sum is σ = 199272144. Its totient is φ = 41287680.

The previous prime is 91441853. The next prime is 91441873. The reversal of 91441856 is 65814419.

It is a super-2 number, since 2×91441856² = 16723226057449472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91441853) 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, 135536 + ... + 136208.

Almost surely, 2^91441856 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 91441856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99636072).

91441856 is an abundant number, since it is smaller than the sum of its proper divisors (107830288).

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

91441856 is a wasteful number, since it uses less digits than its factorization.

91441856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889 (or 879 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The square root of 91441856 is about 9562.5235163110. The cubic root of 91441856 is about 450.5209702964.

The spelling of 91441856 in words is "ninety-one million, four hundred forty-one thousand, eight hundred fifty-six".