91328568 has 16 divisors (see below), whose sum is σ = 228321480. Its totient is φ = 30442848.

The previous prime is 91328557. The next prime is 91328581. The reversal of 91328568 is 86582319.

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 3 ways as a sum of consecutive naturals, for example, 1902655 + ... + 1902702.

Almost surely, 2^91328568 is an apocalyptic number.

It is an amenable number.

91328568 is an abundant number, since it is smaller than the sum of its proper divisors (136992912).

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

91328568 is a wasteful number, since it uses less digits than its factorization.

91328568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3805366 (or 3805362 counting only the distinct ones).

The product of its digits is 103680, while the sum is 42.

The square root of 91328568 is about 9556.5981395055. The cubic root of 91328568 is about 450.3348421423.

The spelling of 91328568 in words is "ninety-one million, three hundred twenty-eight thousand, five hundred sixty-eight".