2188790 has 16 divisors (see below), whose sum is σ = 4024512. Its totient is φ = 856704.

The previous prime is 2188789. The next prime is 2188799. The reversal of 2188790 is 978812.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2188790.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2188799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1859 + ... + 2798.

It is an arithmetic number, because the mean of its divisors is an integer number (251532).

2^2188790 is an apocalyptic number.

2188790 is a deficient number, since it is larger than the sum of its proper divisors (1835722).

2188790 is a wasteful number, since it uses less digits than its factorization.

2188790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4711.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 2188790 is about 1479.4559810958. The cubic root of 2188790 is about 129.8378649315.

The spelling of 2188790 in words is "two million, one hundred eighty-eight thousand, seven hundred ninety".