3855644 has 24 divisors (see below), whose sum is σ = 7408800. Its totient is φ = 1744704.

The previous prime is 3855623. The next prime is 3855647. The reversal of 3855644 is 4465583.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3855647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2057 + ... + 3455.

It is an arithmetic number, because the mean of its divisors is an integer number (308700).

Almost surely, 2^3855644 is an apocalyptic number.

It is an amenable number.

3855644 is a deficient number, since it is larger than the sum of its proper divisors (3553156).

3855644 is a wasteful number, since it uses less digits than its factorization.

3855644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1469 (or 1467 counting only the distinct ones).

The product of its digits is 57600, while the sum is 35.

The square root of 3855644 is about 1963.5793846952. The cubic root of 3855644 is about 156.8070709535.

The spelling of 3855644 in words is "three million, eight hundred fifty-five thousand, six hundred forty-four".