3865860 has 48 divisors (see below), whose sum is σ = 12028800. Its totient is φ = 1030752.

The previous prime is 3865859. The next prime is 3865867. The reversal of 3865860 is 685683.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (3865867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3040 + ... + 4119.

It is an arithmetic number, because the mean of its divisors is an integer number (250600).

Almost surely, 2^3865860 is an apocalyptic number.

3865860 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3865860 is an abundant number, since it is smaller than the sum of its proper divisors (8162940).

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

3865860 is a wasteful number, since it uses less digits than its factorization.

3865860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7177 (or 7169 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 3865860 is about 1966.1790355916. The cubic root of 3865860 is about 156.9454419813.

The spelling of 3865860 in words is "three million, eight hundred sixty-five thousand, eight hundred sixty".