3581866 has 12 divisors (see below), whose sum is σ = 5708358. Its totient is φ = 1685312.

The previous prime is 3581843. The next prime is 3581867. The reversal of 3581866 is 6681853.

It can be written as a sum of positive squares in 3 ways, for example, as 3500641 + 81225 = 1871^2 + 285^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3581867) 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 5 ways as a sum of consecutive naturals, for example, 2521 + ... + 3676.

Almost surely, 2^3581866 is an apocalyptic number.

3581866 is a deficient number, since it is larger than the sum of its proper divisors (2126492).

3581866 is a wasteful number, since it uses less digits than its factorization.

3581866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6233 (or 6216 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 3581866 is about 1892.5818344262. The cubic root of 3581866 is about 153.0041151157.

The spelling of 3581866 in words is "three million, five hundred eighty-one thousand, eight hundred sixty-six".