91088412 has 12 divisors (see below), whose sum is σ = 212539656. Its totient is φ = 30362800.

The previous prime is 91088407. The next prime is 91088419. The reversal of 91088412 is 21488019.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91088419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3795339 + ... + 3795362.

It is an arithmetic number, because the mean of its divisors is an integer number (17711638).

Almost surely, 2^91088412 is an apocalyptic number.

It is an amenable number.

91088412 is an abundant number, since it is smaller than the sum of its proper divisors (121451244).

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

91088412 is a wasteful number, since it uses less digits than its factorization.

91088412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7590708 (or 7590706 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 91088412 is about 9544.0249371007. The cubic root of 91088412 is about 449.9397647770.

The spelling of 91088412 in words is "ninety-one million, eighty-eight thousand, four hundred twelve".