23540439 has 16 divisors (see below), whose sum is σ = 34893824. Its totient is φ = 14018400.

The previous prime is 23540371. The next prime is 23540441. The reversal of 23540439 is 93404532.

It is not a de Polignac number, because 23540439 - 2¹¹ = 23538391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23540039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8527 + ... + 10944.

It is an arithmetic number, because the mean of its divisors is an integer number (2180864).

Almost surely, 2^23540439 is an apocalyptic number.

23540439 is a deficient number, since it is larger than the sum of its proper divisors (11353385).

23540439 is a wasteful number, since it uses less digits than its factorization.

23540439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19518.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 23540439 is about 4851.8490289785. The cubic root of 23540439 is about 286.5969202653.

The spelling of 23540439 in words is "twenty-three million, five hundred forty thousand, four hundred thirty-nine".