90189800 has 24 divisors (see below), whose sum is σ = 209691750. Its totient is φ = 36075840.

The previous prime is 90189793. The next prime is 90189829. The reversal of 90189800 is 898109.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 55920484 + 34269316 = 7478^2 + 5854^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 225275 + ... + 225674.

Almost surely, 2^90189800 is an apocalyptic number.

It is an amenable number.

90189800 is an abundant number, since it is smaller than the sum of its proper divisors (119501950).

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

90189800 is a wasteful number, since it uses less digits than its factorization.

90189800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450965 (or 450956 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 90189800 is about 9496.8310504083. The cubic root of 90189800 is about 448.4552796190.

The spelling of 90189800 in words is "ninety million, one hundred eighty-nine thousand, eight hundred".