240439 has 4 divisors (see below), whose sum is σ = 248760. Its totient is φ = 232120.

The previous prime is 240437. The next prime is 240473. The reversal of 240439 is 934042.

240439 = T₁₁₄ + T₁₁₅ + ... + T₁₄₂.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 934042 = 2 ⋅467021.

It is a cyclic number.

It is not a de Polignac number, because 240439 - 2¹ = 240437 is a prime.

It is a Duffinian number.

240439 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4117 + ... + 4174.

It is an arithmetic number, because the mean of its divisors is an integer number (62190).

2²⁴⁰⁴³⁹ is an apocalyptic number.

240439 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

240439 is a deficient number, since it is larger than the sum of its proper divisors (8321).

240439 is an equidigital number, since it uses as much as digits as its factorization.

240439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8320.

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

The square root of 240439 is about 490.3457963519. The cubic root of 240439 is about 62.1825180137.

The spelling of 240439 in words is "two hundred forty thousand, four hundred thirty-nine".