3866181 has 16 divisors (see below), whose sum is σ = 5698560. Its totient is φ = 2311920.

The previous prime is 3866171. The next prime is 3866183. The reversal of 3866181 is 1816683.

It is not a de Polignac number, because 3866181 - 2⁶ = 3866117 is a prime.

It is a super-2 number, since 2×3866181² = 29894711049522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3866183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1866 + ... + 3348.

It is an arithmetic number, because the mean of its divisors is an integer number (356160).

Almost surely, 2^3866181 is an apocalyptic number.

It is an amenable number.

3866181 is a deficient number, since it is larger than the sum of its proper divisors (1832379).

3866181 is a wasteful number, since it uses less digits than its factorization.

3866181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576.

The product of its digits is 6912, while the sum is 33.

The square root of 3866181 is about 1966.2606643067. The cubic root of 3866181 is about 156.9497858266.

The spelling of 3866181 in words is "three million, eight hundred sixty-six thousand, one hundred eighty-one".