91864168 has 48 divisors (see below), whose sum is σ = 193818240. Its totient is φ = 40766880.

The previous prime is 91864133. The next prime is 91864177. The reversal of 91864168 is 86146819.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40521 + ... + 42727.

It is an arithmetic number, because the mean of its divisors is an integer number (4037880).

Almost surely, 2^91864168 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 91864168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96909120).

91864168 is an abundant number, since it is smaller than the sum of its proper divisors (101954072).

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

91864168 is a wasteful number, since it uses less digits than its factorization.

91864168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2278 (or 2263 counting only the distinct ones).

The product of its digits is 82944, while the sum is 43.

The square root of 91864168 is about 9584.5796986618. The cubic root of 91864168 is about 451.2134623056.

The spelling of 91864168 in words is "ninety-one million, eight hundred sixty-four thousand, one hundred sixty-eight".