2199890 has 32 divisors (see below), whose sum is σ = 4938624. Its totient is φ = 685440.

The previous prime is 2199889. The next prime is 2199893. The reversal of 2199890 is 989912.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2199893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 659 + ... + 2198.

It is an arithmetic number, because the mean of its divisors is an integer number (154332).

2^2199890 is an apocalyptic number.

2199890 is an abundant number, since it is smaller than the sum of its proper divisors (2738734).

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

2199890 is a wasteful number, since it uses less digits than its factorization.

2199890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2882.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 2199890 is about 1483.2026159632. The cubic root of 2199890 is about 130.0569769966.

The spelling of 2199890 in words is "two million, one hundred ninety-nine thousand, eight hundred ninety".