91808448 has 28 divisors (see below), whose sum is σ = 242910360. Its totient is φ = 30602752.

The previous prime is 91808447. The next prime is 91808459. The reversal of 91808448 is 84480819.

It is a super-2 number, since 2×91808448² = 16857582248337408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91808441) 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, 238893 + ... + 239276.

It is an arithmetic number, because the mean of its divisors is an integer number (8675370).

Almost surely, 2^91808448 is an apocalyptic number.

It is an amenable number.

91808448 is an abundant number, since it is smaller than the sum of its proper divisors (151101912).

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

91808448 is a wasteful number, since it uses less digits than its factorization.

91808448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478184 (or 478174 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 42.

The square root of 91808448 is about 9581.6725053615. The cubic root of 91808448 is about 451.1222163585.

The spelling of 91808448 in words is "ninety-one million, eight hundred eight thousand, four hundred forty-eight".