91064088 has 80 divisors (see below), whose sum is σ = 258093000. Its totient is φ = 29994624.

The previous prime is 91064059. The next prime is 91064111. The reversal of 91064088 is 88046019.

It is a happy number.

91064088 is a `hidden beast` number, since 9 + 1 + 0 + 640 + 8 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 56883 + ... + 58461.

Almost surely, 2^91064088 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 91064088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129046500).

91064088 is an abundant number, since it is smaller than the sum of its proper divisors (167028912).

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

91064088 is a wasteful number, since it uses less digits than its factorization.

91064088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1686 (or 1673 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 91064088 is about 9542.7505468811. The cubic root of 91064088 is about 449.8997109841.

The spelling of 91064088 in words is "ninety-one million, sixty-four thousand, eighty-eight".