55039444 has 18 divisors (see below), whose sum is σ = 98427770. Its totient is φ = 26929872.

The previous prime is 55039433. The next prime is 55039459. The reversal of 55039444 is 44493055.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 47087044 + 7952400 = 6862^2 + 2820^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5722 + ... + 11950.

Almost surely, 2^55039444 is an apocalyptic number.

It is an amenable number.

55039444 is a deficient number, since it is larger than the sum of its proper divisors (43388326).

55039444 is a wasteful number, since it uses less digits than its factorization.

55039444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6327 (or 6278 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 55039444 is about 7418.8573244132. The cubic root of 55039444 is about 380.3861356592.

The spelling of 55039444 in words is "fifty-five million, thirty-nine thousand, four hundred forty-four".