190900 has 36 divisors (see below), whose sum is σ = 437472. Its totient is φ = 72160.

The previous prime is 190891. The next prime is 190901. The reversal of 190900 is 9091.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190901) by changing a digit.

190900 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2259 + ... + 2341.

It is an arithmetic number, because the mean of its divisors is an integer number (12152).

2¹⁹⁰⁹⁰⁰ is an apocalyptic number.

190900 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 190900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218736).

190900 is an abundant number, since it is smaller than the sum of its proper divisors (246572).

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

190900 is a wasteful number, since it uses less digits than its factorization.

190900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 19.

The square root of 190900 is about 436.9210454991. The cubic root of 190900 is about 57.5795999003.

Adding to 190900 its reverse (9091), we get a palindrome (199991).

The spelling of 190900 in words is "one hundred ninety thousand, nine hundred".