2188994 has 8 divisors (see below), whose sum is σ = 3372348. Its totient is φ = 1064880.

The previous prime is 2188993. The next prime is 2189017. The reversal of 2188994 is 4998812.

It can be written as a sum of positive squares in 2 ways, for example, as 1923769 + 265225 = 1387^2 + 515^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2188993) 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, 14717 + ... + 14864.

2^2188994 is an apocalyptic number.

2188994 is a deficient number, since it is larger than the sum of its proper divisors (1183354).

2188994 is a wasteful number, since it uses less digits than its factorization.

2188994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29620.

The product of its digits is 41472, while the sum is 41.

The square root of 2188994 is about 1479.5249237509. The cubic root of 2188994 is about 129.8418985302.

The spelling of 2188994 in words is "two million, one hundred eighty-eight thousand, nine hundred ninety-four".