239988 has 24 divisors (see below), whose sum is σ = 640192. Its totient is φ = 68544.

The previous prime is 239977. The next prime is 239999. The reversal of 239988 is 889932.

239988 = T₉₇ + T₉₈ + ... + T₁₃₂.

It is an interprime number because it is at equal distance from previous prime (239977) and next prime (239999).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 239988.

It is an unprimeable number.

239988 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 7 ways as a sum of consecutive naturals, for example, 1345 + ... + 1512.

2²³⁹⁹⁸⁸ is an apocalyptic number.

239988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

239988 is an abundant number, since it is smaller than the sum of its proper divisors (400204).

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

239988 is a wasteful number, since it uses less digits than its factorization.

239988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2871 (or 2869 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 239988 is about 489.8857009548. The cubic root of 239988 is about 62.1436143576.

It can be divided in two parts, 2399 and 88, that multiplied together give a palindrome (211112).

The spelling of 239988 in words is "two hundred thirty-nine thousand, nine hundred eighty-eight".