3866128 has 20 divisors (see below), whose sum is σ = 8560960. Its totient is φ = 1656864.

The previous prime is 3866117. The next prime is 3866141. The reversal of 3866128 is 8216683.

It is a junction number, because it is equal to n+sod(n) for n = 3866093 and 3866102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17148 + ... + 17371.

It is an arithmetic number, because the mean of its divisors is an integer number (428048).

Almost surely, 2^3866128 is an apocalyptic number.

It is an amenable number.

3866128 is an abundant number, since it is smaller than the sum of its proper divisors (4694832).

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

3866128 is a wasteful number, since it uses less digits than its factorization.

3866128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34534 (or 34528 counting only the distinct ones).

The product of its digits is 13824, while the sum is 34.

The square root of 3866128 is about 1966.2471869020. The cubic root of 3866128 is about 156.9490686351.

It can be divided in two parts, 38 and 66128, that added together give a palindrome (66166).

The spelling of 3866128 in words is "three million, eight hundred sixty-six thousand, one hundred twenty-eight".