24440639 has 2 divisors, whose sum is σ = 24440640. Its totient is φ = 24440638.

The previous prime is 24440629. The next prime is 24440671. The reversal of 24440639 is 93604442.

It is an a-pointer prime, because the next prime (24440671) can be obtained adding 24440639 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 24440639 - 2²⁰ = 23392063 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24440629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12220319 + 12220320.

It is an arithmetic number, because the mean of its divisors is an integer number (12220320).

Almost surely, 2^24440639 is an apocalyptic number.

24440639 is a deficient number, since it is larger than the sum of its proper divisors (1).

24440639 is an equidigital number, since it uses as much as digits as its factorization.

24440639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 24440639 is about 4943.7474652332. The cubic root of 24440639 is about 290.2045287261.

The spelling of 24440639 in words is "twenty-four million, four hundred forty thousand, six hundred thirty-nine".