538664 has 16 divisors (see below), whose sum is σ = 1154400. Its totient is φ = 230832.

The previous prime is 538651. The next prime is 538697. The reversal of 538664 is 466835.

It is a self number, because there is not a number n which added to its sum of digits gives 538664.

It is an unprimeable number.

538664 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4754 + ... + 4865.

It is an arithmetic number, because the mean of its divisors is an integer number (72150).

2⁵³⁸⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

538664 is an abundant number, since it is smaller than the sum of its proper divisors (615736).

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

538664 is a wasteful number, since it uses less digits than its factorization.

538664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9632 (or 9628 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 538664 is about 733.9373270246. The cubic root of 538664 is about 81.3653163355.

The spelling of 538664 in words is "five hundred thirty-eight thousand, six hundred sixty-four".