3895646321 has 12 divisors (see below), whose sum is σ = 4646684352. Its totient is φ = 3193296744.

The previous prime is 3895646317. The next prime is 3895646347. The reversal of 3895646321 is 1236465983.

It is not a de Polignac number, because 3895646321 - 2² = 3895646317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3895646021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 789500 + ... + 794418.

It is an arithmetic number, because the mean of its divisors is an integer number (387223696).

Almost surely, 2^3895646321 is an apocalyptic number.

It is an amenable number.

3895646321 is a deficient number, since it is larger than the sum of its proper divisors (751038031).

3895646321 is an frugal number, since it uses more digits than its factorization.

3895646321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9868 (or 4949 counting only the distinct ones).

The product of its digits is 933120, while the sum is 47.

The square root of 3895646321 is about 62415.1129214712. The cubic root of 3895646321 is about 1573.4749758119.

The spelling of 3895646321 in words is "three billion, eight hundred ninety-five million, six hundred forty-six thousand, three hundred twenty-one".