90198036 has 60 divisors (see below), whose sum is σ = 237349728. Its totient is φ = 29868048.

The previous prime is 90198007. The next prime is 90198041. The reversal of 90198036 is 63089109.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 53275 + ... + 54941.

Almost surely, 2^90198036 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 90198036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118674864).

90198036 is an abundant number, since it is smaller than the sum of its proper divisors (147151692).

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

90198036 is a wasteful number, since it uses less digits than its factorization.

90198036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850 (or 1839 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 90198036 is about 9497.2646588373. The cubic root of 90198036 is about 448.4689299625.

The spelling of 90198036 in words is "ninety million, one hundred ninety-eight thousand, thirty-six".