40563809 has 16 divisors (see below), whose sum is σ = 47839680. Its totient is φ = 33908160.

The previous prime is 40563793. The next prime is 40563811. The reversal of 40563809 is 90836504.

40563809 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 40563809 - 2⁴ = 40563793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40563869) 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 15 ways as a sum of consecutive naturals, for example, 59579 + ... + 60255.

It is an arithmetic number, because the mean of its divisors is an integer number (2989980).

Almost surely, 2^40563809 is an apocalyptic number.

It is an amenable number.

40563809 is a deficient number, since it is larger than the sum of its proper divisors (7275871).

40563809 is a wasteful number, since it uses less digits than its factorization.

40563809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 40563809 is about 6368.9723660886. The cubic root of 40563809 is about 343.5945313934.

The spelling of 40563809 in words is "forty million, five hundred sixty-three thousand, eight hundred nine".