91888064 has 14 divisors (see below), whose sum is σ = 182340504. Its totient is φ = 45944000.

The previous prime is 91888063. The next prime is 91888067. The reversal of 91888064 is 46088819.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91888063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 717812 + ... + 717939.

Almost surely, 2^91888064 is an apocalyptic number.

It is an amenable number.

91888064 is a deficient number, since it is larger than the sum of its proper divisors (90452440).

91888064 is a wasteful number, since it uses less digits than its factorization.

91888064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435763 (or 1435753 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 91888064 is about 9585.8262033066. The cubic root of 91888064 is about 451.2525826081.

The spelling of 91888064 in words is "ninety-one million, eight hundred eighty-eight thousand, sixty-four".