2188889 has 4 divisors (see below), whose sum is σ = 2192400. Its totient is φ = 2185380.

The previous prime is 2188877. The next prime is 2188909. The reversal of 2188889 is 9888812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2188889 - 2⁴ = 2188873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2188489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 539 + ... + 2160.

It is an arithmetic number, because the mean of its divisors is an integer number (548100).

2^2188889 is an apocalyptic number.

It is an amenable number.

2188889 is a deficient number, since it is larger than the sum of its proper divisors (3511).

2188889 is an equidigital number, since it uses as much as digits as its factorization.

2188889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3510.

The product of its digits is 73728, while the sum is 44.

The square root of 2188889 is about 1479.4894389620. The cubic root of 2188889 is about 129.8398224445.

The spelling of 2188889 in words is "two million, one hundred eighty-eight thousand, eight hundred eighty-nine".