91367424 has 72 divisors (see below), whose sum is σ = 263939130. Its totient is φ = 30449664.

The previous prime is 91367417. The next prime is 91367443. The reversal of 91367424 is 42476319.

It can be written as a sum of positive squares in only one way, i.e., 63489024 + 27878400 = 7968^2 + 5280^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15954 + ... + 20910.

Almost surely, 2^91367424 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 91367424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131969565).

91367424 is an abundant number, since it is smaller than the sum of its proper divisors (172571706).

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

91367424 is a wasteful number, since it uses less digits than its factorization.

91367424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4985 (or 4962 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 91367424 is about 9558.6308643027. The cubic root of 91367424 is about 450.3986985020.

The spelling of 91367424 in words is "ninety-one million, three hundred sixty-seven thousand, four hundred twenty-four".