23040239 has 4 divisors (see below), whose sum is σ = 23834760. Its totient is φ = 22245720.

The previous prime is 23040229. The next prime is 23040247. The reversal of 23040239 is 93204032.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23040239 - 2¹⁶ = 22974703 is a prime.

It is a super-2 number, since 2×23040239² = 1061705226354242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23040209) 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, 397217 + ... + 397274.

It is an arithmetic number, because the mean of its divisors is an integer number (5958690).

Almost surely, 2^23040239 is an apocalyptic number.

23040239 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

23040239 is a deficient number, since it is larger than the sum of its proper divisors (794521).

23040239 is an equidigital number, since it uses as much as digits as its factorization.

23040239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794520.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 23040239 is about 4800.0248957688. The cubic root of 23040239 is about 284.5524482649.

It can be divided in two parts, 2304023 and 9, that added together give a palindrome (2304032).

The spelling of 23040239 in words is "twenty-three million, forty thousand, two hundred thirty-nine".