40344399 has 20 divisors (see below), whose sum is σ = 61102096. Its totient is φ = 26523936.

The previous prime is 40344371. The next prime is 40344407. The reversal of 40344399 is 99344304.

It is not a de Polignac number, because 40344399 - 2⁹ = 40343887 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 (40344329) 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, 2502 + ... + 9324.

Almost surely, 2^40344399 is an apocalyptic number.

40344399 is a deficient number, since it is larger than the sum of its proper divisors (20757697).

40344399 is an equidigital number, since it uses as much as digits as its factorization.

40344399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6908 (or 6899 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 40344399 is about 6351.7240966528. The cubic root of 40344399 is about 342.9739091125.

The spelling of 40344399 in words is "forty million, three hundred forty-four thousand, three hundred ninety-nine".