40256506 has 16 divisors (see below), whose sum is σ = 62193600. Its totient is φ = 19530720.

The previous prime is 40256501. The next prime is 40256537. The reversal of 40256506 is 60565204.

It is not an unprimeable number, because it can be changed into a prime (40256501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15085 + ... + 17551.

It is an arithmetic number, because the mean of its divisors is an integer number (3887100).

Almost surely, 2^40256506 is an apocalyptic number.

40256506 is a deficient number, since it is larger than the sum of its proper divisors (21937094).

40256506 is a wasteful number, since it uses less digits than its factorization.

40256506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2709.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 40256506 is about 6344.8014941368. The cubic root of 40256506 is about 342.7246640785.

The spelling of 40256506 in words is "forty million, two hundred fifty-six thousand, five hundred six".