40256406 has 32 divisors (see below), whose sum is σ = 89886720. Its totient is φ = 13354632.

The previous prime is 40256387. The next prime is 40256413. The reversal of 40256406 is 60465204.

It is a happy number.

40256406 is a `hidden beast` number, since 4 + 0 + 256 + 406 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 40256406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10371 + ... + 13713.

It is an arithmetic number, because the mean of its divisors is an integer number (2808960).

Almost surely, 2^40256406 is an apocalyptic number.

40256406 is an abundant number, since it is smaller than the sum of its proper divisors (49630314).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40256406 is a wasteful number, since it uses less digits than its factorization.

40256406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3577 (or 3571 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 40256406 is about 6344.7936136647. The cubic root of 40256406 is about 342.7243802942.

The spelling of 40256406 in words is "forty million, two hundred fifty-six thousand, four hundred six".