40808985 has 16 divisors (see below), whose sum is σ = 74622336. Its totient is φ = 18655488.

The previous prime is 40808983. The next prime is 40808987. The reversal of 40808985 is 58980804.

40808985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40808983) and next prime (40808987).

It is not a de Polignac number, because 40808985 - 2¹ = 40808983 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40808983) 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 15 ways as a sum of consecutive naturals, for example, 194224 + ... + 194433.

It is an arithmetic number, because the mean of its divisors is an integer number (4663896).

Almost surely, 2^40808985 is an apocalyptic number.

It is an amenable number.

40808985 is a deficient number, since it is larger than the sum of its proper divisors (33813351).

40808985 is a wasteful number, since it uses less digits than its factorization.

40808985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388672.

The product of its (nonzero) digits is 92160, while the sum is 42.

The square root of 40808985 is about 6388.1910585079. The cubic root of 40808985 is about 344.2853933461.

The spelling of 40808985 in words is "forty million, eight hundred eight thousand, nine hundred eighty-five".