3861636 has 24 divisors (see below), whose sum is σ = 9485280. Its totient is φ = 1219392.

The previous prime is 3861607. The next prime is 3861659. The reversal of 3861636 is 6361683.

3861636 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 3861597 and 3861606.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8241 + ... + 8696.

It is an arithmetic number, because the mean of its divisors is an integer number (395220).

Almost surely, 2^3861636 is an apocalyptic number.

It is an amenable number.

3861636 is an abundant number, since it is smaller than the sum of its proper divisors (5623644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3861636 is a wasteful number, since it uses less digits than its factorization.

3861636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16963 (or 16961 counting only the distinct ones).

The product of its digits is 15552, while the sum is 33.

The square root of 3861636 is about 1965.1045773699. The cubic root of 3861636 is about 156.8882594360. Note that the first 3 decimals are identical.

The spelling of 3861636 in words is "three million, eight hundred sixty-one thousand, six hundred thirty-six".