40344556 has 12 divisors (see below), whose sum is σ = 80689168. Its totient is φ = 17290512.

The previous prime is 40344523. The next prime is 40344559. The reversal of 40344556 is 65544304.

40344556 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (40344559) 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, 720411 + ... + 720466.

Almost surely, 2^40344556 is an apocalyptic number.

It is an amenable number.

40344556 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40344556 is a wasteful number, since it uses less digits than its factorization.

40344556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440888 (or 1440886 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

The square root of 40344556 is about 6351.7364554899. The cubic root of 40344556 is about 342.9743540056.

The spelling of 40344556 in words is "forty million, three hundred forty-four thousand, five hundred fifty-six".