3857905 has 8 divisors (see below), whose sum is σ = 4830912. Its totient is φ = 2952048.

The previous prime is 3857891. The next prime is 3857911. The reversal of 3857905 is 5097583.

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 3857905 - 2⁵ = 3857873 is a prime.

It is a Duffinian number.

3857905 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16659 + ... + 16888.

It is an arithmetic number, because the mean of its divisors is an integer number (603864).

Almost surely, 2^3857905 is an apocalyptic number.

It is an amenable number.

3857905 is a deficient number, since it is larger than the sum of its proper divisors (973007).

3857905 is a wasteful number, since it uses less digits than its factorization.

3857905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33575.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 3857905 is about 1964.1550346141. The cubic root of 3857905 is about 156.8377162022.

The spelling of 3857905 in words is "three million, eight hundred fifty-seven thousand, nine hundred five".