239990 has 16 divisors (see below), whose sum is σ = 438048. Its totient is φ = 94656.

The previous prime is 239977. The next prime is 239999. The reversal of 239990 is 99932.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (239999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 914 + ... + 1146.

It is an arithmetic number, because the mean of its divisors is an integer number (27378).

2²³⁹⁹⁹⁰ is an apocalyptic number.

239990 is a deficient number, since it is larger than the sum of its proper divisors (198058).

239990 is a wasteful number, since it uses less digits than its factorization.

239990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343.

The product of its (nonzero) digits is 4374, while the sum is 32.

The square root of 239990 is about 489.8877422431. The cubic root of 239990 is about 62.1437869869.

The spelling of 239990 in words is "two hundred thirty-nine thousand, nine hundred ninety".