57144644 has 6 divisors (see below), whose sum is σ = 100003134. Its totient is φ = 28572320.

The previous prime is 57144643. The next prime is 57144649. The reversal of 57144644 is 44644175.

It can be written as a sum of positive squares in only one way, i.e., 40170244 + 16974400 = 6338^2 + 4120^2 .

It is not an unprimeable number, because it can be changed into a prime (57144643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7143077 + ... + 7143084.

It is an arithmetic number, because the mean of its divisors is an integer number (16667189).

Almost surely, 2^57144644 is an apocalyptic number.

It is an amenable number.

57144644 is a deficient number, since it is larger than the sum of its proper divisors (42858490).

57144644 is a wasteful number, since it uses less digits than its factorization.

57144644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14286165 (or 14286163 counting only the distinct ones).

The product of its digits is 53760, while the sum is 35.

The square root of 57144644 is about 7559.4076487513. The cubic root of 57144644 is about 385.1753718384.

The spelling of 57144644 in words is "fifty-seven million, one hundred forty-four thousand, six hundred forty-four".