2644456 has 8 divisors (see below), whose sum is σ = 4958370. Its totient is φ = 1322224.

The previous prime is 2644451. The next prime is 2644489. The reversal of 2644456 is 6544462.

It can be written as a sum of positive squares in only one way, i.e., 1779556 + 864900 = 1334^2 + 930^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (2644451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165271 + ... + 165286.

2^2644456 is an apocalyptic number.

It is an amenable number.

2644456 is a deficient number, since it is larger than the sum of its proper divisors (2313914).

2644456 is a wasteful number, since it uses less digits than its factorization.

2644456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330563 (or 330559 counting only the distinct ones).

The product of its digits is 23040, while the sum is 31.

The square root of 2644456 is about 1626.1783420031. The cubic root of 2644456 is about 138.2861806034.

The spelling of 2644456 in words is "two million, six hundred forty-four thousand, four hundred fifty-six".