3865648 has 10 divisors (see below), whose sum is σ = 7489724. Its totient is φ = 1932816.

The previous prime is 3865637. The next prime is 3865663. The reversal of 3865648 is 8465683.

It is a super-3 number, since 3×3865648³ (a number of 21 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3865648.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120786 + ... + 120817.

Almost surely, 2^3865648 is an apocalyptic number.

It is an amenable number.

3865648 is a deficient number, since it is larger than the sum of its proper divisors (3624076).

3865648 is a wasteful number, since it uses less digits than its factorization.

3865648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241611 (or 241605 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The square root of 3865648 is about 1966.1251231801. The cubic root of 3865648 is about 156.9425730171.

The spelling of 3865648 in words is "three million, eight hundred sixty-five thousand, six hundred forty-eight".