40809685 has 8 divisors (see below), whose sum is σ = 55967616. Its totient is φ = 27983760.

The previous prime is 40809649. The next prime is 40809737. The reversal of 40809685 is 58690804.

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

It is not a de Polignac number, because 40809685 - 2⁹ = 40809173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 582961 + ... + 583030.

It is an arithmetic number, because the mean of its divisors is an integer number (6995952).

Almost surely, 2^40809685 is an apocalyptic number.

It is an amenable number.

40809685 is a deficient number, since it is larger than the sum of its proper divisors (15157931).

40809685 is a wasteful number, since it uses less digits than its factorization.

40809685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166003.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 40809685 is about 6388.2458468659. The cubic root of 40809685 is about 344.2873618538.

The spelling of 40809685 in words is "forty million, eight hundred nine thousand, six hundred eighty-five".