265840239 has 24 divisors (see below), whose sum is σ = 414668160. Its totient is φ = 151045104.

The previous prime is 265840213. The next prime is 265840249. The reversal of 265840239 is 932048562.

It is a happy number.

It is not a de Polignac number, because 265840239 - 2¹¹ = 265838191 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 265840197 and 265840206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265840249) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21262 + ... + 31364.

It is an arithmetic number, because the mean of its divisors is an integer number (17277840).

Almost surely, 2^265840239 is an apocalyptic number.

265840239 is a deficient number, since it is larger than the sum of its proper divisors (148827921).

265840239 is a wasteful number, since it uses less digits than its factorization.

265840239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10299 (or 10292 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 265840239 is about 16304.6079069691. The cubic root of 265840239 is about 642.9939790479.

The spelling of 265840239 in words is "two hundred sixty-five million, eight hundred forty thousand, two hundred thirty-nine".