2290644 has 18 divisors (see below), whose sum is σ = 5790330. Its totient is φ = 763536.

The previous prime is 2290643. The next prime is 2290649. The reversal of 2290644 is 4460922.

It can be written as a sum of positive squares in only one way, i.e., 1855044 + 435600 = 1362^2 + 660^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2290643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31779 + ... + 31850.

It is an arithmetic number, because the mean of its divisors is an integer number (321685).

2^2290644 is an apocalyptic number.

It is an amenable number.

2290644 is an abundant number, since it is smaller than the sum of its proper divisors (3499686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2290644 is a wasteful number, since it uses less digits than its factorization.

2290644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63639 (or 63634 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 2290644 is about 1513.4873636737. The cubic root of 2290644 is about 131.8213837582.

The spelling of 2290644 in words is "two million, two hundred ninety thousand, six hundred forty-four".