53440224 has 48 divisors (see below), whose sum is σ = 146385792. Its totient is φ = 17038208.

The previous prime is 53440223. The next prime is 53440237. The reversal of 53440224 is 42204435.

It is a tau number, because it is divible by the number of its divisors (48).

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

It is a junction number, because it is equal to n+sod(n) for n = 53440194 and 53440203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53440223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9894 + ... + 14309.

It is an arithmetic number, because the mean of its divisors is an integer number (3049704).

Almost surely, 2^53440224 is an apocalyptic number.

It is an amenable number.

53440224 is an abundant number, since it is smaller than the sum of its proper divisors (92945568).

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

53440224 is a wasteful number, since it uses less digits than its factorization.

53440224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24239 (or 24231 counting only the distinct ones).

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

The square root of 53440224 is about 7310.2820739011. The cubic root of 53440224 is about 376.6657136618.

Adding to 53440224 its reverse (42204435), we get a palindrome (95644659).

The spelling of 53440224 in words is "fifty-three million, four hundred forty thousand, two hundred twenty-four".