91899408 has 40 divisors (see below), whose sum is σ = 240668128. Its totient is φ = 30212352.

The previous prime is 91899391. The next prime is 91899413. The reversal of 91899408 is 80499819.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9610 + ... + 16617.

Almost surely, 2^91899408 is an apocalyptic number.

It is an amenable number.

91899408 is an abundant number, since it is smaller than the sum of its proper divisors (148768720).

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

91899408 is a wasteful number, since it uses less digits than its factorization.

91899408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26311 (or 26305 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 48.

The square root of 91899408 is about 9586.4178919970. The cubic root of 91899408 is about 451.2711515728.

The spelling of 91899408 in words is "ninety-one million, eight hundred ninety-nine thousand, four hundred eight".