3886209 has 6 divisors (see below), whose sum is σ = 5613426. Its totient is φ = 2590800.

The previous prime is 3886199. The next prime is 3886229. The reversal of 3886209 is 9026883.

It can be written as a sum of positive squares in only one way, i.e., 3686400 + 199809 = 1920^2 + 447^2 .

It is not a de Polignac number, because 3886209 - 2⁴ = 3886193 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3886229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 215892 + ... + 215909.

It is an arithmetic number, because the mean of its divisors is an integer number (935571).

Almost surely, 2^3886209 is an apocalyptic number.

It is an amenable number.

3886209 is a deficient number, since it is larger than the sum of its proper divisors (1727217).

3886209 is a wasteful number, since it uses less digits than its factorization.

3886209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431807 (or 431804 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 3886209 is about 1971.3470014181. The cubic root of 3886209 is about 157.2203351508.

It can be divided in two parts, 3886 and 209, that added together give a triangular number (4095 = T₉₀).

The spelling of 3886209 in words is "three million, eight hundred eighty-six thousand, two hundred nine".