3865236 has 36 divisors (see below), whose sum is σ = 9364992. Its totient is φ = 1240736.

The previous prime is 3865231. The next prime is 3865243. The reversal of 3865236 is 6325683.

It is a zygodrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 3865197 and 3865206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3865231) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 9901 + ... + 10283.

Almost surely, 2^3865236 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 3865236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4682496).

3865236 is an abundant number, since it is smaller than the sum of its proper divisors (5499756).

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

3865236 is a wasteful number, since it uses less digits than its factorization.

3865236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448 (or 417 counting only the distinct ones).

The product of its digits is 25920, while the sum is 33.

The square root of 3865236 is about 1966.0203457747. The cubic root of 3865236 is about 156.9369971829.

The spelling of 3865236 in words is "three million, eight hundred sixty-five thousand, two hundred thirty-six".