53440144 has 10 divisors (see below), whose sum is σ = 103540310. Its totient is φ = 26720064.

The previous prime is 53440133. The next prime is 53440169. The reversal of 53440144 is 44104435.

It can be written as a sum of positive squares in only one way, i.e., 47775744 + 5664400 = 6912^2 + 2380^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1669989 + ... + 1670020.

It is an arithmetic number, because the mean of its divisors is an integer number (10354031).

Almost surely, 2^53440144 is an apocalyptic number.

It is an amenable number.

53440144 is a deficient number, since it is larger than the sum of its proper divisors (50100166).

53440144 is a wasteful number, since it uses less digits than its factorization.

53440144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3340017 (or 3340011 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 53440144 is about 7310.2766021540. The cubic root of 53440144 is about 376.6655257055.

Adding to 53440144 its reverse (44104435), we get a palindrome (97544579).

The spelling of 53440144 in words is "fifty-three million, four hundred forty thousand, one hundred forty-four".