2190664 has 16 divisors (see below), whose sum is σ = 4694400. Its totient is φ = 938832.

The previous prime is 2190653. The next prime is 2190679. The reversal of 2190664 is 4660912.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19504 + ... + 19615.

It is an arithmetic number, because the mean of its divisors is an integer number (293400).

2^2190664 is an apocalyptic number.

It is an amenable number.

2190664 is an abundant number, since it is smaller than the sum of its proper divisors (2503736).

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

2190664 is a wasteful number, since it uses less digits than its factorization.

2190664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39132 (or 39128 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 2190664 is about 1480.0891865019. The cubic root of 2190664 is about 129.8749092575.

The spelling of 2190664 in words is "two million, one hundred ninety thousand, six hundred sixty-four".