53444540 has 48 divisors (see below), whose sum is σ = 115867584. Its totient is φ = 20697600.

The previous prime is 53444533. The next prime is 53444543. The reversal of 53444540 is 4544435.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53444543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86312 + ... + 86928.

It is an arithmetic number, because the mean of its divisors is an integer number (2413908).

Almost surely, 2^53444540 is an apocalyptic number.

It is an amenable number.

53444540 is an abundant number, since it is smaller than the sum of its proper divisors (62423044).

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

53444540 is a wasteful number, since it uses less digits than its factorization.

53444540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758 (or 756 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 29.

The square root of 53444540 is about 7310.5772685883. The cubic root of 53444540 is about 376.6758536234.

Adding to 53444540 its reverse (4544435), we get a palindrome (57988975).

The spelling of 53444540 in words is "fifty-three million, four hundred forty-four thousand, five hundred forty".