239820 has 48 divisors (see below), whose sum is σ = 768768. Its totient is φ = 54720.

The previous prime is 239807. The next prime is 239831. The reversal of 239820 is 28932.

239820 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an Ulam number.

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, 135 + ... + 705.

It is an arithmetic number, because the mean of its divisors is an integer number (16016).

2²³⁹⁸²⁰ is an apocalyptic number.

239820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 239820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (384384).

239820 is an abundant number, since it is smaller than the sum of its proper divisors (528948).

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

239820 is a wasteful number, since it uses less digits than its factorization.

239820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590 (or 588 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 239820 is about 489.7142023671. The cubic root of 239820 is about 62.1291100709.

The spelling of 239820 in words is "two hundred thirty-nine thousand, eight hundred twenty".