40293985 has 4 divisors (see below), whose sum is σ = 48352788. Its totient is φ = 32235184.

The previous prime is 40293971. The next prime is 40294013. The reversal of 40293985 is 58939204.

It is a happy number.

40293985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8020224 + 32273761 = 2832^2 + 5681^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40293985 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4029394 + ... + 4029403.

It is an arithmetic number, because the mean of its divisors is an integer number (12088197).

Almost surely, 2^40293985 is an apocalyptic number.

It is an amenable number.

40293985 is a deficient number, since it is larger than the sum of its proper divisors (8058803).

40293985 is an equidigital number, since it uses as much as digits as its factorization.

40293985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8058802.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 40293985 is about 6347.7543273192. The cubic root of 40293985 is about 342.8309905234.

The spelling of 40293985 in words is "forty million, two hundred ninety-three thousand, nine hundred eighty-five".