40243687 has 8 divisors (see below), whose sum is σ = 43963920. Its totient is φ = 36533760.

The previous prime is 40243681. The next prime is 40243699. The reversal of 40243687 is 78634204.

40243687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40243687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40243681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7239 + ... + 11527.

It is an arithmetic number, because the mean of its divisors is an integer number (5495490).

Almost surely, 2^40243687 is an apocalyptic number.

40243687 is a deficient number, since it is larger than the sum of its proper divisors (3720233).

40243687 is a wasteful number, since it uses less digits than its factorization.

40243687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5153.

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 40243687 is about 6343.7912166149. The cubic root of 40243687 is about 342.6882819354.

The spelling of 40243687 in words is "forty million, two hundred forty-three thousand, six hundred eighty-seven".