538866 has 32 divisors (see below), whose sum is σ = 1270080. Its totient is φ = 168768.

The previous prime is 538841. The next prime is 538871. The reversal of 538866 is 668835.

It is a d-powerful number, because it can be written as 5² + 3⁸ + 8⁶ + 8⁶ + 6³ + 6⁵ .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 538866.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 538866.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 625 + ... + 1211.

It is an arithmetic number, because the mean of its divisors is an integer number (39690).

2⁵³⁸⁸⁶⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 538866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (635040).

538866 is an abundant number, since it is smaller than the sum of its proper divisors (731214).

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

538866 is a wasteful number, since it uses less digits than its factorization.

538866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615 (or 609 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 538866 is about 734.0749280557. The cubic root of 538866 is about 81.3754857793.

The spelling of 538866 in words is "five hundred thirty-eight thousand, eight hundred sixty-six".