90199688 has 64 divisors (see below), whose sum is σ = 191678400. Its totient is φ = 39536640.

The previous prime is 90199687. The next prime is 90199691. The reversal of 90199688 is 88699109.

It is not an unprimeable number, because it can be changed into a prime (90199687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172868 + ... + 173388.

It is an arithmetic number, because the mean of its divisors is an integer number (2994975).

Almost surely, 2^90199688 is an apocalyptic number.

It is an amenable number.

90199688 is an abundant number, since it is smaller than the sum of its proper divisors (101478712).

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

90199688 is a wasteful number, since it uses less digits than its factorization.

90199688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630 (or 626 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 50.

The square root of 90199688 is about 9497.3516308495. The cubic root of 90199688 is about 448.4716678867.

The spelling of 90199688 in words is "ninety million, one hundred ninety-nine thousand, six hundred eighty-eight".