2290665 has 32 divisors (see below), whose sum is σ = 4185216. Its totient is φ = 1059840.

The previous prime is 2290649. The next prime is 2290703. The reversal of 2290665 is 5660922.

It is not a de Polignac number, because 2290665 - 2⁴ = 2290649 is a prime.

It is a super-2 number, since 2×2290665² = 10494292284450, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2970 + ... + 3660.

It is an arithmetic number, because the mean of its divisors is an integer number (130788).

2^2290665 is an apocalyptic number.

It is an amenable number.

2290665 is a deficient number, since it is larger than the sum of its proper divisors (1894551).

2290665 is a wasteful number, since it uses less digits than its factorization.

2290665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 2290665 is about 1513.4943012777. The cubic root of 2290665 is about 131.8217865911.

The spelling of 2290665 in words is "two million, two hundred ninety thousand, six hundred sixty-five".