2644556 has 6 divisors (see below), whose sum is σ = 4627980. Its totient is φ = 1322276.

The previous prime is 2644547. The next prime is 2644561. The reversal of 2644556 is 6554462.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330566 + ... + 330573.

It is an arithmetic number, because the mean of its divisors is an integer number (771330).

2^2644556 is an apocalyptic number.

It is an amenable number.

2644556 is a deficient number, since it is larger than the sum of its proper divisors (1983424).

2644556 is a wasteful number, since it uses less digits than its factorization.

2644556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661143 (or 661141 counting only the distinct ones).

The product of its digits is 28800, while the sum is 32.

The square root of 2644556 is about 1626.2090886476. The cubic root of 2644556 is about 138.2879236770.

The spelling of 2644556 in words is "two million, six hundred forty-four thousand, five hundred fifty-six".