90198808 has 48 divisors (see below), whose sum is σ = 198633600. Its totient is φ = 38283840.

The previous prime is 90198769. The next prime is 90198841. The reversal of 90198808 is 80889109.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41673 + ... + 43783.

It is an arithmetic number, because the mean of its divisors is an integer number (4138200).

Almost surely, 2^90198808 is an apocalyptic number.

90198808 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90198808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99316800).

90198808 is an abundant number, since it is smaller than the sum of its proper divisors (108434792).

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

90198808 is a wasteful number, since it uses less digits than its factorization.

90198808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240 (or 2229 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 43.

The square root of 90198808 is about 9497.3053020317. The cubic root of 90198808 is about 448.4702094324.

The spelling of 90198808 in words is "ninety million, one hundred ninety-eight thousand, eight hundred eight".