91389360 has 80 divisors (see below), whose sum is σ = 284919264. Its totient is φ = 24231936.

The previous prime is 91389359. The next prime is 91389367. The reversal of 91389360 is 6398319.

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

It is not an unprimeable number, because it can be changed into a prime (91389367) 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, 45334 + ... + 47306.

Almost surely, 2^91389360 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 91389360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142459632).

91389360 is an abundant number, since it is smaller than the sum of its proper divisors (193529904).

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

91389360 is a wasteful number, since it uses less digits than its factorization.

91389360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2182 (or 2176 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 91389360 is about 9559.7782401058. The cubic root of 91389360 is about 450.4347403604.

The spelling of 91389360 in words is "ninety-one million, three hundred eighty-nine thousand, three hundred sixty".