40255691 has 8 divisors (see below), whose sum is σ = 46053600. Its totient is φ = 34469568.

The previous prime is 40255687. The next prime is 40255703. The reversal of 40255691 is 19655204.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40255691 - 2² = 40255687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40255601) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 6335 + ... + 10983.

It is an arithmetic number, because the mean of its divisors is an integer number (5756700).

Almost surely, 2^40255691 is an apocalyptic number.

40255691 is a deficient number, since it is larger than the sum of its proper divisors (5797909).

40255691 is a wasteful number, since it uses less digits than its factorization.

40255691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5893.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 40255691 is about 6344.7372680041. The cubic root of 40255691 is about 342.7223512227.

The spelling of 40255691 in words is "forty million, two hundred fifty-five thousand, six hundred ninety-one".