2289890 has 8 divisors (see below), whose sum is σ = 4121820. Its totient is φ = 915952.

The previous prime is 2289871. The next prime is 2289901. The reversal of 2289890 is 989822.

It can be written as a sum of positive squares in 2 ways, for example, as 2199289 + 90601 = 1483^2 + 301^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114485 + ... + 114504.

2^2289890 is an apocalyptic number.

2289890 is a deficient number, since it is larger than the sum of its proper divisors (1831930).

2289890 is a wasteful number, since it uses less digits than its factorization.

2289890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228996.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 2289890 is about 1513.2382495827. The cubic root of 2289890 is about 131.8069185058.

The spelling of 2289890 in words is "two million, two hundred eighty-nine thousand, eight hundred ninety".