40809256 has 8 divisors (see below), whose sum is σ = 76517370. Its totient is φ = 20404624.

The previous prime is 40809239. The next prime is 40809257. The reversal of 40809256 is 65290804.

It is a happy number.

40809256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 33246756 + 7562500 = 5766^2 + 2750^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (40809257) 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 as a sum of consecutive naturals, namely, 2550571 + ... + 2550586.

Almost surely, 2^40809256 is an apocalyptic number.

It is an amenable number.

40809256 is a deficient number, since it is larger than the sum of its proper divisors (35708114).

40809256 is a wasteful number, since it uses less digits than its factorization.

40809256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5101163 (or 5101159 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 40809256 is about 6388.2122694851. The cubic root of 40809256 is about 344.2861554424.

The spelling of 40809256 in words is "forty million, eight hundred nine thousand, two hundred fifty-six".