40006687 has 12 divisors (see below), whose sum is σ = 46826640. Its totient is φ = 34079136.

The previous prime is 40006663. The next prime is 40006697. The reversal of 40006687 is 78660004.

40006687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-40006687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40006607) 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 11 ways as a sum of consecutive naturals, for example, 5739 + ... + 10627.

It is an arithmetic number, because the mean of its divisors is an integer number (3902220).

Almost surely, 2^40006687 is an apocalyptic number.

40006687 is a deficient number, since it is larger than the sum of its proper divisors (6819953).

40006687 is a wasteful number, since it uses less digits than its factorization.

40006687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5070 (or 5063 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 40006687 is about 6325.0839520120. The cubic root of 40006687 is about 342.0142459554.

The spelling of 40006687 in words is "forty million, six thousand, six hundred eighty-seven".