3865900 has 36 divisors (see below), whose sum is σ = 8528968. Its totient is φ = 1520640.

The previous prime is 3865889. The next prime is 3865907. The reversal of 3865900 is 95683.

It is not an unprimeable number, because it can be changed into a prime (3865907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6412 + ... + 6988.

Almost surely, 2^3865900 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3865900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4264484).

3865900 is an abundant number, since it is smaller than the sum of its proper divisors (4663068).

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

3865900 is a wasteful number, since it uses less digits than its factorization.

3865900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658 (or 651 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 3865900 is about 1966.1892075790. The cubic root of 3865900 is about 156.9459832836.

The spelling of 3865900 in words is "three million, eight hundred sixty-five thousand, nine hundred".