91238812 has 12 divisors (see below), whose sum is σ = 182477680. Its totient is φ = 39102336.

The previous prime is 91238803. The next prime is 91238827. The reversal of 91238812 is 21883219.

91238812 is an admirable number.

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, 1629237 + ... + 1629292.

Almost surely, 2^91238812 is an apocalyptic number.

It is an amenable number.

91238812 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

91238812 is a wasteful number, since it uses less digits than its factorization.

91238812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3258540 (or 3258538 counting only the distinct ones).

The product of its digits is 6912, while the sum is 34.

The square root of 91238812 is about 9551.9009626357. The cubic root of 91238812 is about 450.1872669143.

The spelling of 91238812 in words is "ninety-one million, two hundred thirty-eight thousand, eight hundred twelve".