2190688 has 24 divisors (see below), whose sum is σ = 4567752. Its totient is φ = 1030656.

The previous prime is 2190679. The next prime is 2190691. The reversal of 2190688 is 8860912.

It is a super-2 number, since 2×2190688² = 9598227826688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

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, 1470 + ... + 2557.

It is an arithmetic number, because the mean of its divisors is an integer number (190323).

2^2190688 is an apocalyptic number.

It is an amenable number.

2190688 is an abundant number, since it is smaller than the sum of its proper divisors (2377064).

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

2190688 is a wasteful number, since it uses less digits than its factorization.

2190688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4054 (or 4046 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 2190688 is about 1480.0972940993. The cubic root of 2190688 is about 129.8753835409.

It can be divided in two parts, 21 and 90688, that added together give a palindrome (90709).

The spelling of 2190688 in words is "two million, one hundred ninety thousand, six hundred eighty-eight".