2189402 has 4 divisors (see below), whose sum is σ = 3284106. Its totient is φ = 1094700.

The previous prime is 2189399. The next prime is 2189417. The reversal of 2189402 is 2049812.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1515361 + 674041 = 1231^2 + 821^2 .

It is a super-2 number, since 2×2189402² = 9586962235208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 547349 + ... + 547352.

2^2189402 is an apocalyptic number.

2189402 is a deficient number, since it is larger than the sum of its proper divisors (1094704).

2189402 is a wasteful number, since it uses less digits than its factorization.

2189402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094703.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 2189402 is about 1479.6627994242. The cubic root of 2189402 is about 129.8499649759.

It can be divided in two parts, 2189 and 402, that multiplied together give a palindrome (879978).

The spelling of 2189402 in words is "two million, one hundred eighty-nine thousand, four hundred two".