3128916 has 36 divisors (see below), whose sum is σ = 8387232. Its totient is φ = 889344.

The previous prime is 3128893. The next prime is 3128921. The reversal of 3128916 is 6198213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16116 + ... + 16308.

Almost surely, 2^3128916 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 3128916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4193616).

3128916 is an abundant number, since it is smaller than the sum of its proper divisors (5258316).

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

3128916 is a wasteful number, since it uses less digits than its factorization.

3128916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 205 counting only the distinct ones).

The product of its digits is 2592, while the sum is 30.

The square root of 3128916 is about 1768.8742182530. The cubic root of 3128916 is about 146.2619305046.

The spelling of 3128916 in words is "three million, one hundred twenty-eight thousand, nine hundred sixteen".