3855705 has 16 divisors (see below), whose sum is σ = 7050624. Its totient is φ = 1762560.

The previous prime is 3855703. The next prime is 3855757. The reversal of 3855705 is 5075583.

It is not a de Polignac number, because 3855705 - 2¹ = 3855703 is a prime.

It is a super-2 number, since 2×3855705² = 29732922094050, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3855703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18256 + ... + 18465.

It is an arithmetic number, because the mean of its divisors is an integer number (440664).

Almost surely, 2^3855705 is an apocalyptic number.

3855705 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3855705 is a deficient number, since it is larger than the sum of its proper divisors (3194919).

3855705 is a wasteful number, since it uses less digits than its factorization.

3855705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36736.

The product of its (nonzero) digits is 21000, while the sum is 33.

The square root of 3855705 is about 1963.5949174919. The cubic root of 3855705 is about 156.8078978954.

It can be divided in two parts, 3855 and 705, that added together give a triangular number (4560 = T₉₅).

The spelling of 3855705 in words is "three million, eight hundred fifty-five thousand, seven hundred five".