2190900 has 72 divisors (see below), whose sum is σ = 6492640. Its totient is φ = 570240.

The previous prime is 2190887. The next prime is 2190901. The reversal of 2190900 is 90912.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2190901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20046 + ... + 20154.

2^2190900 is an apocalyptic number.

2190900 is a gapful number since it is divisible by the number (20) 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 2190900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3246320).

2190900 is an abundant number, since it is smaller than the sum of its proper divisors (4301740).

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

2190900 is a wasteful number, since it uses less digits than its factorization.

2190900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 186 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 2190900 is about 1480.1689092803. The cubic root of 2190900 is about 129.8795728935.

The spelling of 2190900 in words is "two million, one hundred ninety thousand, nine hundred".