40107985 has 4 divisors (see below), whose sum is σ = 48129588. Its totient is φ = 32086384.

The previous prime is 40107979. The next prime is 40107989. The reversal of 40107985 is 58970104.

It is a happy number.

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 17564481 + 22543504 = 4191^2 + 4748^2 .

It is a cyclic number.

It is not a de Polignac number, because 40107985 - 2⁵ = 40107953 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40107985.

It is not an unprimeable number, because it can be changed into a prime (40107989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4010794 + ... + 4010803.

It is an arithmetic number, because the mean of its divisors is an integer number (12032397).

Almost surely, 2^40107985 is an apocalyptic number.

It is an amenable number.

40107985 is a deficient number, since it is larger than the sum of its proper divisors (8021603).

40107985 is an equidigital number, since it uses as much as digits as its factorization.

40107985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8021602.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 40107985 is about 6333.0865302789. The cubic root of 40107985 is about 342.3026657318.

The spelling of 40107985 in words is "forty million, one hundred seven thousand, nine hundred eighty-five".