2556044 has 6 divisors (see below), whose sum is σ = 4473084. Its totient is φ = 1278020.

The previous prime is 2556041. The next prime is 2556061. The reversal of 2556044 is 4406552.

It is not an unprimeable number, because it can be changed into a prime (2556041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319502 + ... + 319509.

It is an arithmetic number, because the mean of its divisors is an integer number (745514).

2^2556044 is an apocalyptic number.

It is an amenable number.

2556044 is a deficient number, since it is larger than the sum of its proper divisors (1917040).

2556044 is a wasteful number, since it uses less digits than its factorization.

2556044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639015 (or 639013 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 2556044 is about 1598.7632720325. The cubic root of 2556044 is about 136.7275741472.

The spelling of 2556044 in words is "two million, five hundred fifty-six thousand, forty-four".