53044440 has 64 divisors (see below), whose sum is σ = 166060800. Its totient is φ = 13529472.

The previous prime is 53044367. The next prime is 53044457. The reversal of 53044440 is 4444035.

It is a super-2 number, since 2×53044440² = 5627425229827200, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 53044440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6850 + ... + 12369.

It is an arithmetic number, because the mean of its divisors is an integer number (2594700).

Almost surely, 2^53044440 is an apocalyptic number.

It is an amenable number.

53044440 is an abundant number, since it is smaller than the sum of its proper divisors (113016360).

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

53044440 is a wasteful number, since it uses less digits than its factorization.

53044440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19256 (or 19252 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 53044440 is about 7283.1614014794. The cubic root of 53044440 is about 375.7335330978.

Adding to 53044440 its reverse (4444035), we get a palindrome (57488475).

The spelling of 53044440 in words is "fifty-three million, forty-four thousand, four hundred forty".