3865144 has 16 divisors (see below), whose sum is σ = 7335720. Its totient is φ = 1908960.

The previous prime is 3865133. The next prime is 3865153. The reversal of 3865144 is 4415683.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2247 + ... + 3574.

Almost surely, 2^3865144 is an apocalyptic number.

It is an amenable number.

3865144 is a deficient number, since it is larger than the sum of its proper divisors (3470576).

3865144 is a wasteful number, since it uses less digits than its factorization.

3865144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5910 (or 5906 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 3865144 is about 1965.9969481156. The cubic root of 3865144 is about 156.9357520396.

The spelling of 3865144 in words is "three million, eight hundred sixty-five thousand, one hundred forty-four".