3865266 has 32 divisors (see below), whose sum is σ = 8870400. Its totient is φ = 1246320.

The previous prime is 3865247. The next prime is 3865283. The reversal of 3865266 is 6625683.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3865266.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 520 + ... + 2828.

It is an arithmetic number, because the mean of its divisors is an integer number (277200).

Almost surely, 2^3865266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3865266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4435200).

3865266 is an abundant number, since it is smaller than the sum of its proper divisors (5005134).

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

3865266 is a wasteful number, since it uses less digits than its factorization.

3865266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2351 (or 2345 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 3865266 is about 1966.0279753859. The cubic root of 3865266 is about 156.9374032036.

The spelling of 3865266 in words is "three million, eight hundred sixty-five thousand, two hundred sixty-six".