3859644 has 24 divisors (see below), whose sum is σ = 9060688. Its totient is φ = 1278720.

The previous prime is 3859621. The next prime is 3859649. The reversal of 3859644 is 4469583.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3859649) 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 7 ways as a sum of consecutive naturals, for example, 1284 + ... + 3060.

Almost surely, 2^3859644 is an apocalyptic number.

It is an amenable number.

3859644 is an abundant number, since it is smaller than the sum of its proper divisors (5201044).

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

3859644 is a wasteful number, since it uses less digits than its factorization.

3859644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965 (or 1963 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 3859644 is about 1964.5976687353. The cubic root of 3859644 is about 156.8612781975.

The spelling of 3859644 in words is "three million, eight hundred fifty-nine thousand, six hundred forty-four".