3864581 has 16 divisors (see below), whose sum is σ = 4752000. Its totient is φ = 3132864.

The previous prime is 3864557. The next prime is 3864583. The reversal of 3864581 is 1854683.

3864581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3864581 - 2¹⁴ = 3848197 is a prime.

It is a super-2 number, since 2×3864581² = 29869972611122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3864583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6221 + ... + 6813.

It is an arithmetic number, because the mean of its divisors is an integer number (297000).

Almost surely, 2^3864581 is an apocalyptic number.

It is an amenable number.

3864581 is a deficient number, since it is larger than the sum of its proper divisors (887419).

3864581 is an equidigital number, since it uses as much as digits as its factorization.

3864581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633 (or 619 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The square root of 3864581 is about 1965.8537585487. The cubic root of 3864581 is about 156.9281318734.

The spelling of 3864581 in words is "three million, eight hundred sixty-four thousand, five hundred eighty-one".