3128684 has 12 divisors (see below), whose sum is σ = 5896464. Its totient is φ = 1443984.

The previous prime is 3128659. The next prime is 3128687. The reversal of 3128684 is 4868213.

It is a self number, because there is not a number n which added to its sum of digits gives 3128684.

It is not an unprimeable number, because it can be changed into a prime (3128687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30032 + ... + 30135.

It is an arithmetic number, because the mean of its divisors is an integer number (491372).

Almost surely, 2^3128684 is an apocalyptic number.

It is an amenable number.

3128684 is a deficient number, since it is larger than the sum of its proper divisors (2767780).

3128684 is a wasteful number, since it uses less digits than its factorization.

3128684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60184 (or 60182 counting only the distinct ones).

The product of its digits is 9216, while the sum is 32.

The square root of 3128684 is about 1768.8086386040. The cubic root of 3128684 is about 146.2583154500.

The spelling of 3128684 in words is "three million, one hundred twenty-eight thousand, six hundred eighty-four".