53443432 has 32 divisors (see below), whose sum is σ = 115819200. Its totient is φ = 22644864.

The previous prime is 53443391. The next prime is 53443457. The reversal of 53443432 is 23434435.

53443432 = T₁₅₃ + T₁₅₄ + ... + T₆₈₆.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 53443432.

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, 378 + ... + 10345.

It is an arithmetic number, because the mean of its divisors is an integer number (3619350).

Almost surely, 2^53443432 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 53443432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57909600).

53443432 is an abundant number, since it is smaller than the sum of its proper divisors (62375768).

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

53443432 is a wasteful number, since it uses less digits than its factorization.

53443432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10825 (or 10821 counting only the distinct ones).

The product of its digits is 17280, while the sum is 28.

The square root of 53443432 is about 7310.5014875862. The cubic root of 53443432 is about 376.6732505528.

Adding to 53443432 its reverse (23434435), we get a palindrome (76877867).

The spelling of 53443432 in words is "fifty-three million, four hundred forty-three thousand, four hundred thirty-two".