40020006256 has 40 divisors (see below), whose sum is σ = 81232550784. Its totient is φ = 19063704000.

The previous prime is 40020006253. The next prime is 40020006287. The reversal of 40020006256 is 65260002004.

It is a self number, because there is not a number n which added to its sum of digits gives 40020006256.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40020006253) 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, 124266 + ... + 309001.

Almost surely, 2^40020006256 is an apocalyptic number.

40020006256 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

40020006256 is an abundant number, since it is smaller than the sum of its proper divisors (41212544528).

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

40020006256 is a wasteful number, since it uses less digits than its factorization.

40020006256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433549 (or 433543 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The spelling of 40020006256 in words is "forty billion, twenty million, six thousand, two hundred fifty-six".