40644056 has 32 divisors (see below), whose sum is σ = 79585680. Its totient is φ = 19440000.

The previous prime is 40644047. The next prime is 40644061. The reversal of 40644056 is 65044604.

40644056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×40644056² = 3303878576262272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16931 + ... + 19181.

Almost surely, 2^40644056 is an apocalyptic number.

It is an amenable number.

40644056 is a deficient number, since it is larger than the sum of its proper divisors (38941624).

40644056 is a wasteful number, since it uses less digits than its factorization.

40644056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2355 (or 2351 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 40644056 is about 6375.2690923599. The cubic root of 40644056 is about 343.8209587507.

The spelling of 40644056 in words is "forty million, six hundred forty-four thousand, fifty-six".