2189290 has 32 divisors (see below), whose sum is σ = 4155984. Its totient is φ = 829440.

The previous prime is 2189287. The next prime is 2189303. The reversal of 2189290 is 929812.

It can be written as a sum of positive squares in 8 ways, for example, as 727609 + 1461681 = 853^2 + 1209^2 .

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22522 + ... + 22618.

2^2189290 is an apocalyptic number.

2189290 is a deficient number, since it is larger than the sum of its proper divisors (1966694).

2189290 is a wasteful number, since it uses less digits than its factorization.

2189290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 2189290 is about 1479.6249524795. The cubic root of 2189290 is about 129.8477507573.

The spelling of 2189290 in words is "two million, one hundred eighty-nine thousand, two hundred ninety".