90198844 has 12 divisors (see below), whose sum is σ = 157976224. Its totient is φ = 45062784.

The previous prime is 90198841. The next prime is 90198853. The reversal of 90198844 is 44889109.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 90198844.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90198841) 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, 3189 + ... + 13804.

Almost surely, 2^90198844 is an apocalyptic number.

It is an amenable number.

90198844 is a deficient number, since it is larger than the sum of its proper divisors (67777380).

90198844 is a wasteful number, since it uses less digits than its factorization.

90198844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18324 (or 18322 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 90198844 is about 9497.3071973060. The cubic root of 90198844 is about 448.4702690967.

The spelling of 90198844 in words is "ninety million, one hundred ninety-eight thousand, eight hundred forty-four".