538728 has 16 divisors (see below), whose sum is σ = 1346880. Its totient is φ = 179568.

The previous prime is 538723. The next prime is 538739. The reversal of 538728 is 827835.

538728 is nontrivially palindromic in base 11.

It is a nialpdrome in base 15.

It is a zygodrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (538721) by changing a digit.

538728 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11200 + ... + 11247.

It is an arithmetic number, because the mean of its divisors is an integer number (84180).

2⁵³⁸⁷²⁸ is an apocalyptic number.

It is an amenable number.

538728 is an abundant number, since it is smaller than the sum of its proper divisors (808152).

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

538728 is a wasteful number, since it uses less digits than its factorization.

538728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22456 (or 22452 counting only the distinct ones).

The product of its digits is 13440, while the sum is 33.

The square root of 538728 is about 733.9809261827. The cubic root of 538728 is about 81.3685386126.

The spelling of 538728 in words is "five hundred thirty-eight thousand, seven hundred twenty-eight".