91636672 has 28 divisors (see below), whose sum is σ = 183465216. Its totient is φ = 45409280.

The previous prime is 91636631. The next prime is 91636693. The reversal of 91636672 is 27663619.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 897 + ... + 13567.

Almost surely, 2^91636672 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 91636672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91732608).

91636672 is an abundant number, since it is smaller than the sum of its proper divisors (91828544).

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

91636672 is a wasteful number, since it uses less digits than its factorization.

91636672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12796 (or 12786 counting only the distinct ones).

The product of its digits is 81648, while the sum is 40.

The square root of 91636672 is about 9572.7045290242. The cubic root of 91636672 is about 450.8406868927.

The spelling of 91636672 in words is "ninety-one million, six hundred thirty-six thousand, six hundred seventy-two".