40635641 has 8 divisors (see below), whose sum is σ = 43865280. Its totient is φ = 37527952.

The previous prime is 40635631. The next prime is 40635649. The reversal of 40635641 is 14653604.

It is a happy number.

40635641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 40635641 - 2¹⁰ = 40634617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40635649) by changing a digit.

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, 29795 + ... + 31128.

It is an arithmetic number, because the mean of its divisors is an integer number (5483160).

Almost surely, 2^40635641 is an apocalyptic number.

It is an amenable number.

40635641 is a deficient number, since it is larger than the sum of its proper divisors (3229639).

40635641 is a wasteful number, since it uses less digits than its factorization.

40635641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60975.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 40635641 is about 6374.6090860538. The cubic root of 40635641 is about 343.7972287285.

The spelling of 40635641 in words is "forty million, six hundred thirty-five thousand, six hundred forty-one".