3952216985 has 16 divisors (see below), whose sum is σ = 4802490000. Its totient is φ = 3122036736.

The previous prime is 3952216979. The next prime is 3952216991. The reversal of 3952216985 is 5896122593.

3952216985 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 (3952216979) and next prime (3952216991).

It can be written as a sum of positive squares in 8 ways, for example, as 89718784 + 3862498201 = 9472^2 + 62149^2 .

It is a cyclic number.

It is not a de Polignac number, because 3952216985 - 2¹⁸ = 3951954841 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208691 + ... + 226839.

It is an arithmetic number, because the mean of its divisors is an integer number (300155625).

Almost surely, 2^3952216985 is an apocalyptic number.

It is an amenable number.

3952216985 is a deficient number, since it is larger than the sum of its proper divisors (850273015).

3952216985 is a wasteful number, since it uses less digits than its factorization.

3952216985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18700.

The product of its digits is 1166400, while the sum is 50.

The square root of 3952216985 is about 62866.6603614348. The cubic root of 3952216985 is about 1581.0548135918.

The spelling of 3952216985 in words is "three billion, nine hundred fifty-two million, two hundred sixteen thousand, nine hundred eighty-five".