40440663 has 6 divisors (see below), whose sum is σ = 58414304. Its totient is φ = 26960436.

The previous prime is 40440661. The next prime is 40440679. The reversal of 40440663 is 36604404.

It is a happy number.

40440663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40440663 - 2¹ = 40440661 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 (40440661) 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 5 ways as a sum of consecutive naturals, for example, 2246695 + ... + 2246712.

Almost surely, 2^40440663 is an apocalyptic number.

40440663 is a deficient number, since it is larger than the sum of its proper divisors (17973641).

40440663 is a wasteful number, since it uses less digits than its factorization.

40440663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4493413 (or 4493410 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 40440663 is about 6359.2973668480. The cubic root of 40440663 is about 343.2464774375.

The spelling of 40440663 in words is "forty million, four hundred forty thousand, six hundred sixty-three".