40644055 has 8 divisors (see below), whose sum is σ = 49021632. Its totient is φ = 32349408.

The previous prime is 40644047. The next prime is 40644061. The reversal of 40644055 is 55044604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40644055 - 2³ = 40644047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19647 + ... + 21616.

It is an arithmetic number, because the mean of its divisors is an integer number (6127704).

Almost surely, 2^40644055 is an apocalyptic number.

40644055 is a deficient number, since it is larger than the sum of its proper divisors (8377577).

40644055 is a wasteful number, since it uses less digits than its factorization.

40644055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41465.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 40644055 is about 6375.2690139319. The cubic root of 40644055 is about 343.8209559310.

Adding to 40644055 its reverse (55044604), we get a palindrome (95688659).

The spelling of 40644055 in words is "forty million, six hundred forty-four thousand, fifty-five".