40565985 has 32 divisors (see below), whose sum is σ = 67140480. Its totient is φ = 20901888.

The previous prime is 40565977. The next prime is 40566013. The reversal of 40565985 is 58956504.

It is not a de Polignac number, because 40565985 - 2³ = 40565977 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70017 + ... + 70593.

It is an arithmetic number, because the mean of its divisors is an integer number (2098140).

Almost surely, 2^40565985 is an apocalyptic number.

It is an amenable number.

40565985 is a deficient number, since it is larger than the sum of its proper divisors (26574495).

40565985 is a wasteful number, since it uses less digits than its factorization.

40565985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737.

The product of its (nonzero) digits is 216000, while the sum is 42.

The square root of 40565985 is about 6369.1431919843. The cubic root of 40565985 is about 343.6006751979.

The spelling of 40565985 in words is "forty million, five hundred sixty-five thousand, nine hundred eighty-five".