239986 has 4 divisors (see below), whose sum is σ = 359982. Its totient is φ = 119992.

The previous prime is 239977. The next prime is 239999. The reversal of 239986 is 689932.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 235225 + 4761 = 485^2 + 69^2 .

It is an unprimeable number.

239986 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 as a sum of consecutive naturals, namely, 59995 + ... + 59998.

2²³⁹⁹⁸⁶ is an apocalyptic number.

239986 is a deficient number, since it is larger than the sum of its proper divisors (119996).

239986 is a wasteful number, since it uses less digits than its factorization.

239986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119995.

The product of its digits is 23328, while the sum is 37.

The square root of 239986 is about 489.8836596581. The cubic root of 239986 is about 62.1434417274.

It can be divided in two parts, 2399 and 86, that added together give a triangular number (2485 = T₇₀).

The spelling of 239986 in words is "two hundred thirty-nine thousand, nine hundred eighty-six".