239728 has 10 divisors (see below), whose sum is σ = 464504. Its totient is φ = 119856.

The previous prime is 239713. The next prime is 239731. The reversal of 239728 is 827932.

It is a self number, because there is not a number n which added to its sum of digits gives 239728.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7476 + ... + 7507.

2²³⁹⁷²⁸ is an apocalyptic number.

It is an amenable number.

239728 is a deficient number, since it is larger than the sum of its proper divisors (224776).

239728 is a wasteful number, since it uses less digits than its factorization.

239728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14991 (or 14985 counting only the distinct ones).

The product of its digits is 6048, while the sum is 31.

The square root of 239728 is about 489.6202610187. The cubic root of 239728 is about 62.1211643766.

The spelling of 239728 in words is "two hundred thirty-nine thousand, seven hundred twenty-eight".