91366320 has 80 divisors (see below), whose sum is σ = 290918880. Its totient is φ = 23703552.

The previous prime is 91366291. The next prime is 91366321. The reversal of 91366320 is 2366319.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (91366321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3736 + ... + 14024.

It is an arithmetic number, because the mean of its divisors is an integer number (3636486).

Almost surely, 2^91366320 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 91366320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145459440).

91366320 is an abundant number, since it is smaller than the sum of its proper divisors (199552560).

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

91366320 is a wasteful number, since it uses less digits than its factorization.

91366320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10342 (or 10336 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 91366320 is about 9558.5731152720. The cubic root of 91366320 is about 450.3968844267.

The spelling of 91366320 in words is "ninety-one million, three hundred sixty-six thousand, three hundred twenty".