40005256 has 8 divisors (see below), whose sum is σ = 75009870. Its totient is φ = 20002624.

The previous prime is 40005227. The next prime is 40005269. The reversal of 40005256 is 65250004.

It can be written as a sum of positive squares in only one way, i.e., 20557156 + 19448100 = 4534^2 + 4410^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2500321 + ... + 2500336.

Almost surely, 2^40005256 is an apocalyptic number.

It is an amenable number.

40005256 is a deficient number, since it is larger than the sum of its proper divisors (35004614).

40005256 is a wasteful number, since it uses less digits than its factorization.

40005256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5000663 (or 5000659 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 40005256 is about 6324.9708299723. The cubic root of 40005256 is about 342.0101680686.

The spelling of 40005256 in words is "forty million, five thousand, two hundred fifty-six".