4128684 has 48 divisors (see below), whose sum is σ = 11493888. Its totient is φ = 1127808.

The previous prime is 4128623. The next prime is 4128689. The reversal of 4128684 is 4868214.

It is not an unprimeable number, because it can be changed into a prime (4128689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 864 + ... + 3000.

It is an arithmetic number, because the mean of its divisors is an integer number (239456).

Almost surely, 2^4128684 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 4128684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5746944).

4128684 is an abundant number, since it is smaller than the sum of its proper divisors (7365204).

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

4128684 is a wasteful number, since it uses less digits than its factorization.

4128684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2174 (or 2172 counting only the distinct ones).

The product of its digits is 12288, while the sum is 33.

The square root of 4128684 is about 2031.9163368604. The cubic root of 4128684 is about 160.4244459562.

The spelling of 4128684 in words is "four million, one hundred twenty-eight thousand, six hundred eighty-four".