3866628 has 48 divisors (see below), whose sum is σ = 9596160. Its totient is φ = 1209600.

The previous prime is 3866627. The next prime is 3866647. The reversal of 3866628 is 8266683.

3866628 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (3866623) 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, 14133 + ... + 14403.

It is an arithmetic number, because the mean of its divisors is an integer number (199920).

Almost surely, 2^3866628 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 3866628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4798080).

3866628 is an abundant number, since it is smaller than the sum of its proper divisors (5729532).

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

3866628 is a wasteful number, since it uses less digits than its factorization.

3866628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348 (or 346 counting only the distinct ones).

The product of its digits is 82944, while the sum is 39.

The square root of 3866628 is about 1966.3743285550. The cubic root of 3866628 is about 156.9558343320.

It can be divided in two parts, 38 and 66628, that added together give a palindrome (66666).

The spelling of 3866628 in words is "three million, eight hundred sixty-six thousand, six hundred twenty-eight".