3128816 has 20 divisors (see below), whose sum is σ = 6419232. Its totient is φ = 1472256.

The previous prime is 3128813. The next prime is 3128819. The reversal of 3128816 is 6188213.

It is an interprime number because it is at equal distance from previous prime (3128813) and next prime (3128819).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3128813) 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, 5480 + ... + 6023.

Almost surely, 2^3128816 is an apocalyptic number.

It is an amenable number.

3128816 is an abundant number, since it is smaller than the sum of its proper divisors (3290416).

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

3128816 is a wasteful number, since it uses less digits than its factorization.

3128816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11528 (or 11522 counting only the distinct ones).

The product of its digits is 2304, while the sum is 29.

The square root of 3128816 is about 1768.8459514610. The cubic root of 3128816 is about 146.2603723133.

The spelling of 3128816 in words is "three million, one hundred twenty-eight thousand, eight hundred sixteen".