53443040 has 48 divisors (see below), whose sum is σ = 144299232. Its totient is φ = 18322944.

The previous prime is 53442989. The next prime is 53443063. The reversal of 53443040 is 4034435.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 53442997 and 53443015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22739 + ... + 24978.

It is an arithmetic number, because the mean of its divisors is an integer number (3006234).

Almost surely, 2^53443040 is an apocalyptic number.

It is an amenable number.

53443040 is an abundant number, since it is smaller than the sum of its proper divisors (90856192).

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

53443040 is a wasteful number, since it uses less digits than its factorization.

53443040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47739 (or 47731 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 53443040 is about 7310.4746767908. The cubic root of 53443040 is about 376.6723296022.

Adding to 53443040 its reverse (4034435), we get a palindrome (57477475).

The spelling of 53443040 in words is "fifty-three million, four hundred forty-three thousand, forty".