3856912690 has 16 divisors (see below), whose sum is σ = 6971495040. Its totient is φ = 1536309040.

The previous prime is 3856912679. The next prime is 3856912693. The reversal of 3856912690 is 962196583.

It is a super-2 number, since 2×3856912690² = 29751550996566072200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3856912693) 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 7 ways as a sum of consecutive naturals, for example, 804496 + ... + 809275.

It is an arithmetic number, because the mean of its divisors is an integer number (435718440).

Almost surely, 2^3856912690 is an apocalyptic number.

3856912690 is a deficient number, since it is larger than the sum of its proper divisors (3114582350).

3856912690 is a wasteful number, since it uses less digits than its factorization.

3856912690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614017.

The product of its (nonzero) digits is 699840, while the sum is 49.

The square root of 3856912690 is about 62104.0472916218. The cubic root of 3856912690 is about 1568.2426805873.

The spelling of 3856912690 in words is "three billion, eight hundred fifty-six million, nine hundred twelve thousand, six hundred ninety".