2190390 has 16 divisors (see below), whose sum is σ = 5257008. Its totient is φ = 584096.

The previous prime is 2190389. The next prime is 2190403. The reversal of 2190390 is 930912.

It is a happy number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 2190390.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36477 + ... + 36536.

It is an arithmetic number, because the mean of its divisors is an integer number (328563).

2^2190390 is an apocalyptic number.

2190390 is an abundant number, since it is smaller than the sum of its proper divisors (3066618).

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

2190390 is a wasteful number, since it uses less digits than its factorization.

2190390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73023.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 2190390 is about 1479.9966216178. The cubic root of 2190390 is about 129.8694942770.

The spelling of 2190390 in words is "two million, one hundred ninety thousand, three hundred ninety".