52440144 has 40 divisors (see below), whose sum is σ = 137773920. Its totient is φ = 17182848.

The previous prime is 52440131. The next prime is 52440173. The reversal of 52440144 is 44104425.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6427 + ... + 12090.

It is an arithmetic number, because the mean of its divisors is an integer number (3444348).

Almost surely, 2^52440144 is an apocalyptic number.

It is an amenable number.

52440144 is an abundant number, since it is smaller than the sum of its proper divisors (85333776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

52440144 is a wasteful number, since it uses less digits than its factorization.

52440144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18587 (or 18581 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 52440144 is about 7241.5567387130. The cubic root of 52440144 is about 374.3012624063.

Adding to 52440144 its reverse (44104425), we get a palindrome (96544569).

The spelling of 52440144 in words is "fifty-two million, four hundred forty thousand, one hundred forty-four".