40318687 has 4 divisors (see below), whose sum is σ = 40345096. Its totient is φ = 40292280.

The previous prime is 40318673. The next prime is 40318697. The reversal of 40318687 is 78681304.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40318687 - 2⁷ = 40318559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40318667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10764 + ... + 14017.

It is an arithmetic number, because the mean of its divisors is an integer number (10086274).

Almost surely, 2^40318687 is an apocalyptic number.

40318687 is a deficient number, since it is larger than the sum of its proper divisors (26409).

40318687 is a wasteful number, since it uses less digits than its factorization.

40318687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26408.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 40318687 is about 6349.6997566814. The cubic root of 40318687 is about 342.9010330800.

The spelling of 40318687 in words is "forty million, three hundred eighteen thousand, six hundred eighty-seven".