91634688 has 132 divisors (see below), whose sum is σ = 270580648. Its totient is φ = 29859840.

The previous prime is 91634687. The next prime is 91634717. The reversal of 91634688 is 88643619.

91634688 is a `hidden beast` number, since 9 + 1 + 634 + 6 + 8 + 8 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91634687) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 562095 + ... + 562257.

Almost surely, 2^91634688 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 91634688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135290324).

91634688 is an abundant number, since it is smaller than the sum of its proper divisors (178945960).

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

91634688 is a wasteful number, since it uses less digits than its factorization.

91634688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250 (or 229 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 91634688 is about 9572.6009004868. The cubic root of 91634688 is about 450.8374331940.

The spelling of 91634688 in words is "ninety-one million, six hundred thirty-four thousand, six hundred eighty-eight".