40385985 has 32 divisors (see below), whose sum is σ = 66147840. Its totient is φ = 21036288.

The previous prime is 40385971. The next prime is 40386013. The reversal of 40385985 is 58958304.

It is not a de Polignac number, because 40385985 - 2⁷ = 40385857 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, 204907 + ... + 205103.

It is an arithmetic number, because the mean of its divisors is an integer number (2067120).

Almost surely, 2^40385985 is an apocalyptic number.

It is an amenable number.

40385985 is a deficient number, since it is larger than the sum of its proper divisors (25761855).

40385985 is a wasteful number, since it uses less digits than its factorization.

40385985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457.

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 40385985 is about 6354.9968528710. The cubic root of 40385985 is about 343.0917116289.

The spelling of 40385985 in words is "forty million, three hundred eighty-five thousand, nine hundred eighty-five".