538628 has 18 divisors (see below), whose sum is σ = 1009386. Its totient is φ = 250624.

The previous prime is 538621. The next prime is 538649. The reversal of 538628 is 826835.

It can be written as a sum of positive squares in 3 ways, for example, as 23104 + 515524 = 152^2 + 718^2 .

It is a junction number, because it is equal to n+sod(n) for n = 538594 and 538603.

It is not an unprimeable number, because it can be changed into a prime (538621) by changing a digit.

538628 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 (5) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6008 + ... + 6096.

It is an arithmetic number, because the mean of its divisors is an integer number (56077).

2⁵³⁸⁶²⁸ is an apocalyptic number.

It is an amenable number.

538628 is a deficient number, since it is larger than the sum of its proper divisors (470758).

538628 is a wasteful number, since it uses less digits than its factorization.

538628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 108 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 538628 is about 733.9128013599. The cubic root of 538628 is about 81.3635036925.

The spelling of 538628 in words is "five hundred thirty-eight thousand, six hundred twenty-eight".