2555444 has 6 divisors (see below), whose sum is σ = 4472034. Its totient is φ = 1277720.

The previous prime is 2555429. The next prime is 2555453. The reversal of 2555444 is 4445552.

It can be written as a sum of positive squares in only one way, i.e., 2439844 + 115600 = 1562^2 + 340^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319427 + ... + 319434.

It is an arithmetic number, because the mean of its divisors is an integer number (745339).

2^2555444 is an apocalyptic number.

It is an amenable number.

2555444 is a deficient number, since it is larger than the sum of its proper divisors (1916590).

2555444 is a wasteful number, since it uses less digits than its factorization.

2555444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638865 (or 638863 counting only the distinct ones).

The product of its digits is 16000, while the sum is 29.

The square root of 2555444 is about 1598.5756159782. The cubic root of 2555444 is about 136.7168749359.

The spelling of 2555444 in words is "two million, five hundred fifty-five thousand, four hundred forty-four".