91318368 has 96 divisors (see below), whose sum is σ = 251887104. Its totient is φ = 28933632.

The previous prime is 91318333. The next prime is 91318379. The reversal of 91318368 is 86381319.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166671 + ... + 167217.

It is an arithmetic number, because the mean of its divisors is an integer number (2623824).

Almost surely, 2^91318368 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 91318368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125943552).

91318368 is an abundant number, since it is smaller than the sum of its proper divisors (160568736).

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

91318368 is a wasteful number, since it uses less digits than its factorization.

91318368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644 (or 636 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 91318368 is about 9556.0644619006. The cubic root of 91318368 is about 450.3180763537.

The spelling of 91318368 in words is "ninety-one million, three hundred eighteen thousand, three hundred sixty-eight".