2188402 has 8 divisors (see below), whose sum is σ = 3371436. Its totient is φ = 1064592.

The previous prime is 2188349. The next prime is 2188409. The reversal of 2188402 is 2048812.

It can be written as a sum of positive squares in 2 ways, for example, as 2187441 + 961 = 1479^2 + 31^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2188409) 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, 14713 + ... + 14860.

2^2188402 is an apocalyptic number.

2188402 is a deficient number, since it is larger than the sum of its proper divisors (1183034).

2188402 is a wasteful number, since it uses less digits than its factorization.

2188402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29612.

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 2188402 is about 1479.3248460024. The cubic root of 2188402 is about 129.8301924932.

The spelling of 2188402 in words is "two million, one hundred eighty-eight thousand, four hundred two".