239872 has 18 divisors (see below), whose sum is σ = 479318. Its totient is φ = 119808.

The previous prime is 239857. The next prime is 239873. The reversal of 239872 is 278932.

It can be written as a sum of positive squares in only one way, i.e., 147456 + 92416 = 384^2 + 304^2 .

It is a nialpdrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (239873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213 + ... + 724.

239872 is a Friedman number, since it can be written as ((3*2)^8-2^9)/7, using all its digits and the basic arithmetic operations.

2²³⁹⁸⁷² is an apocalyptic number.

It is an amenable number.

239872 is a deficient number, since it is larger than the sum of its proper divisors (239446).

239872 is an frugal number, since it uses more digits than its factorization.

239872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953 (or 939 counting only the distinct ones).

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

The square root of 239872 is about 489.7672916804. The cubic root of 239872 is about 62.1336002166.

Subtracting 239872 from its reverse (278932), we obtain a triangular number (39060 = T₂₇₉).

It can be divided in two parts, 23987 and 2, that multiplied together give a palindrome (47974).

The spelling of 239872 in words is "two hundred thirty-nine thousand, eight hundred seventy-two".