40255688 has 32 divisors (see below), whose sum is σ = 84101760. Its totient is φ = 17906880.

The previous prime is 40255687. The next prime is 40255703. The reversal of 40255688 is 88655204.

It is not an unprimeable number, because it can be changed into a prime (40255687) 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, 731 + ... + 9002.

It is an arithmetic number, because the mean of its divisors is an integer number (2628180).

Almost surely, 2^40255688 is an apocalyptic number.

It is an amenable number.

40255688 is an abundant number, since it is smaller than the sum of its proper divisors (43846072).

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

40255688 is a wasteful number, since it uses less digits than its factorization.

40255688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9797 (or 9793 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 38.

The square root of 40255688 is about 6344.7370315877. The cubic root of 40255688 is about 342.7223427090.

The spelling of 40255688 in words is "forty million, two hundred fifty-five thousand, six hundred eighty-eight".