2290639 has 16 divisors (see below), whose sum is σ = 2644992. Its totient is φ = 1967328.

The previous prime is 2290637. The next prime is 2290643. The reversal of 2290639 is 9360922.

It is not a de Polignac number, because 2290639 - 2¹ = 2290637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2290639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2290637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13972 + ... + 14134.

It is an arithmetic number, because the mean of its divisors is an integer number (165312).

2^2290639 is an apocalyptic number.

2290639 is a deficient number, since it is larger than the sum of its proper divisors (354353).

2290639 is a wasteful number, since it uses less digits than its factorization.

2290639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 2290639 is about 1513.4857118586. The cubic root of 2290639 is about 131.8212878452.

The spelling of 2290639 in words is "two million, two hundred ninety thousand, six hundred thirty-nine".