190188900 has 108 divisors (see below), whose sum is σ = 650364624. Its totient is φ = 46104000.

The previous prime is 190188893. The next prime is 190188913. The reversal of 190188900 is 9881091.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

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 35 ways as a sum of consecutive naturals, for example, 295 + ... + 19505.

Almost surely, 2^190188900 is an apocalyptic number.

190188900 is a gapful number since it is divisible by the number (10) 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 190188900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325182312).

190188900 is an abundant number, since it is smaller than the sum of its proper divisors (460175724).

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

190188900 is a wasteful number, since it uses less digits than its factorization.

190188900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19242 (or 19232 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 190188900 is about 13790.8991730054. The cubic root of 190188900 is about 575.0801652565.

The spelling of 190188900 in words is "one hundred ninety million, one hundred eighty-eight thousand, nine hundred".