23240439 has 20 divisors (see below), whose sum is σ = 36546840. Its totient is φ = 14677200.

The previous prime is 23240429. The next prime is 23240443. The reversal of 23240439 is 93404232.

It is a happy number.

It is not a de Polignac number, because 23240439 - 2⁴ = 23240423 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23240429) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6012 + ... + 9089.

It is an arithmetic number, because the mean of its divisors is an integer number (1827342).

Almost surely, 2^23240439 is an apocalyptic number.

23240439 is a deficient number, since it is larger than the sum of its proper divisors (13306401).

23240439 is a wasteful number, since it uses less digits than its factorization.

23240439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15132 (or 15123 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 23240439 is about 4820.8338490348. The cubic root of 23240439 is about 285.3742451903.

The spelling of 23240439 in words is "twenty-three million, two hundred forty thousand, four hundred thirty-nine".