3865660 has 12 divisors (see below), whose sum is σ = 8117928. Its totient is φ = 1546256.

The previous prime is 3865637. The next prime is 3865663. The reversal of 3865660 is 665683.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3865663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96622 + ... + 96661.

It is an arithmetic number, because the mean of its divisors is an integer number (676494).

Almost surely, 2^3865660 is an apocalyptic number.

It is an amenable number.

3865660 is an abundant number, since it is smaller than the sum of its proper divisors (4252268).

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

3865660 is a wasteful number, since it uses less digits than its factorization.

3865660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193292 (or 193290 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 3865660 is about 1966.1281748655. The cubic root of 3865660 is about 156.9427354141.

The spelling of 3865660 in words is "three million, eight hundred sixty-five thousand, six hundred sixty".