53245440 has 120 divisors (see below), whose sum is σ = 184483728. Its totient is φ = 14192640.

The previous prime is 53245427. The next prime is 53245441. The reversal of 53245440 is 4454235.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53245441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21885 + ... + 24195.

Almost surely, 2^53245440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53245440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92241864).

53245440 is an abundant number, since it is smaller than the sum of its proper divisors (131238288).

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

53245440 is a wasteful number, since it uses less digits than its factorization.

53245440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2340 (or 2321 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 53245440 is about 7296.9473069223. The cubic root of 53245440 is about 376.2075208754.

Adding to 53245440 its reverse (4454235), we get a palindrome (57699675).

The spelling of 53245440 in words is "fifty-three million, two hundred forty-five thousand, four hundred forty".