53253440 has 28 divisors (see below), whose sum is σ = 126810516. Its totient is φ = 21301248.

The previous prime is 53253439. The next prime is 53253449. The reversal of 53253440 is 4435235.

It can be written as a sum of positive squares in 2 ways, for example, as 8202496 + 45050944 = 2864^2 + 6712^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53253449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82889 + ... + 83528.

It is an arithmetic number, because the mean of its divisors is an integer number (4528947).

Almost surely, 2^53253440 is an apocalyptic number.

It is an amenable number.

53253440 is an abundant number, since it is smaller than the sum of its proper divisors (73557076).

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

53253440 is a wasteful number, since it uses less digits than its factorization.

53253440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166434 (or 166424 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 53253440 is about 7297.4954607728. The cubic root of 53253440 is about 376.2263613586.

Adding to 53253440 its reverse (4435235), we get a palindrome (57688675).

The spelling of 53253440 in words is "fifty-three million, two hundred fifty-three thousand, four hundred forty".