2539444 has 6 divisors (see below), whose sum is σ = 4444034. Its totient is φ = 1269720.

The previous prime is 2539441. The next prime is 2539463. The reversal of 2539444 is 4449352.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2250000 + 289444 = 1500^2 + 538^2 .

It is a super-3 number, since 3×2539444³ = 49128915259933321152, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2539441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317427 + ... + 317434.

2^2539444 is an apocalyptic number.

It is an amenable number.

2539444 is a deficient number, since it is larger than the sum of its proper divisors (1904590).

2539444 is a wasteful number, since it uses less digits than its factorization.

2539444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634865 (or 634863 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The square root of 2539444 is about 1593.5633027903. The cubic root of 2539444 is about 136.4309427196.

The spelling of 2539444 in words is "two million, five hundred thirty-nine thousand, four hundred forty-four".