3905870321 has 8 divisors (see below), whose sum is σ = 3971067264. Its totient is φ = 3840711120.

The previous prime is 3905870317. The next prime is 3905870333. The reversal of 3905870321 is 1230785093.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3905870321 - 2² = 3905870317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3905875321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265070 + ... + 279416.

It is an arithmetic number, because the mean of its divisors is an integer number (496383408).

Almost surely, 2^3905870321 is an apocalyptic number.

It is an amenable number.

3905870321 is a deficient number, since it is larger than the sum of its proper divisors (65196943).

3905870321 is a wasteful number, since it uses less digits than its factorization.

3905870321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18871.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 3905870321 is about 62496.9624941885. The cubic root of 3905870321 is about 1574.8502850551.

The spelling of 3905870321 in words is "three billion, nine hundred five million, eight hundred seventy thousand, three hundred twenty-one".