91992408 has 32 divisors (see below), whose sum is σ = 237913200. Its totient is φ = 29606528.

The previous prime is 91992359. The next prime is 91992421. The reversal of 91992408 is 80429919.

It is a self number, because there is not a number n which added to its sum of digits gives 91992408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65391 + ... + 66782.

Almost surely, 2^91992408 is an apocalyptic number.

It is an amenable number.

91992408 is an abundant number, since it is smaller than the sum of its proper divisors (145920792).

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

91992408 is a wasteful number, since it uses less digits than its factorization.

91992408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132211 (or 132207 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 91992408 is about 9591.2672781025. The cubic root of 91992408 is about 451.4233254516.

The spelling of 91992408 in words is "ninety-one million, nine hundred ninety-two thousand, four hundred eight".