40305687 has 8 divisors (see below), whose sum is σ = 54151680. Its totient is φ = 26665080.

The previous prime is 40305667. The next prime is 40305701. The reversal of 40305687 is 78650304.

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

It is not a de Polignac number, because 40305687 - 2²³ = 31917079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40305647) 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, 50887 + ... + 51672.

It is an arithmetic number, because the mean of its divisors is an integer number (6768960).

Almost surely, 2^40305687 is an apocalyptic number.

40305687 is a deficient number, since it is larger than the sum of its proper divisors (13845993).

40305687 is a wasteful number, since it uses less digits than its factorization.

40305687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102693.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 40305687 is about 6348.6760037034. The cubic root of 40305687 is about 342.8641751286.

The spelling of 40305687 in words is "forty million, three hundred five thousand, six hundred eighty-seven".