90911808 has 280 divisors, whose sum is σ = 309798720. Its totient is φ = 26127360.

The previous prime is 90911797. The next prime is 90911813. The reversal of 90911808 is 80811909.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 39 ways as a sum of consecutive naturals, for example, 1280413 + ... + 1280483.

It is an arithmetic number, because the mean of its divisors is an integer number (1106424).

Almost surely, 2^90911808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90911808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154899360).

90911808 is an abundant number, since it is smaller than the sum of its proper divisors (218886912).

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

90911808 is a wasteful number, since it uses less digits than its factorization.

90911808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 90911808 is about 9534.7683768406. The cubic root of 90911808 is about 449.6487926344.

It can be divided in two parts, 90911 and 808, that added together give a palindrome (91719).

The spelling of 90911808 in words is "ninety million, nine hundred eleven thousand, eight hundred eight".