52543728 has 50 divisors (see below), whose sum is σ = 152080544. Its totient is φ = 17514144.

The previous prime is 52543727. The next prime is 52543783. The reversal of 52543728 is 82734525.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 52543692 and 52543701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52543727) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 18976 + ... + 21567.

Almost surely, 2^52543728 is an apocalyptic number.

It is an amenable number.

52543728 is an abundant number, since it is smaller than the sum of its proper divisors (99536816).

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

52543728 is a wasteful number, since it uses less digits than its factorization.

52543728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40563 (or 40548 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 52543728 is about 7248.7052637005. The cubic root of 52543728 is about 374.5475503243.

It can be divided in two parts, 525 and 43728, that added together give a triangular number (44253 = T₂₉₇).

The spelling of 52543728 in words is "fifty-two million, five hundred forty-three thousand, seven hundred twenty-eight".