91159344 has 100 divisors (see below), whose sum is σ = 272472640. Its totient is φ = 29393280.

The previous prime is 91159319. The next prime is 91159349. The reversal of 91159344 is 44395119.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 91159299 and 91159308.

It is not an unprimeable number, because it can be changed into a prime (91159349) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 39042 + ... + 41310.

Almost surely, 2^91159344 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 91159344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136236320).

91159344 is an abundant number, since it is smaller than the sum of its proper divisors (181313296).

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

91159344 is a wasteful number, since it uses less digits than its factorization.

91159344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2320 (or 2305 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 91159344 is about 9547.7402562072. The cubic root of 91159344 is about 450.0565262326.

The spelling of 91159344 in words is "ninety-one million, one hundred fifty-nine thousand, three hundred forty-four".