440239 has 2 divisors, whose sum is σ = 440240. Its totient is φ = 440238.

The previous prime is 440227. The next prime is 440261. The reversal of 440239 is 932044.

It is an a-pointer prime, because the next prime (440261) can be obtained adding 440239 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 440239 - 2⁵ = 440207 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220119 + 220120.

It is an arithmetic number, because the mean of its divisors is an integer number (220120).

2⁴⁴⁰²³⁹ is an apocalyptic number.

440239 is a deficient number, since it is larger than the sum of its proper divisors (1).

440239 is an equidigital number, since it uses as much as digits as its factorization.

440239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 440239 is about 663.5050866421. The cubic root of 440239 is about 76.0728180201.

The spelling of 440239 in words is "four hundred forty thousand, two hundred thirty-nine".