Search a number
BaseRepresentation
bin110000111000
311021212
4300320
5100003
622252
712056
oct6070
94255
103128
112394
121988
131568
1411d6
15dd8
hexc38

3128 has 16 divisors (see below), whose sum is σ = 6480. Its totient is φ = 1408.

The previous prime is 3121. The next prime is 3137. The reversal of 3128 is 8213.

It is a plaindrome in base 13.

It is a nialpdrome in base 15.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125 + ... + 147.

It is an arithmetic number, because the mean of its divisors is an integer number (405).

23128 is an apocalyptic number.

It is an amenable number.

3128 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3240).

3128 is a wasteful number, since it uses less digits than its factorization.

3128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46 (or 42 counting only the distinct ones).

The product of its digits is 48, while the sum is 14.

The square root of 3128 is about 55.9285258164. The cubic root of 3128 is about 14.6247656231.

It can be divided in two parts, 31 and 28, that multiplied together give a palindrome (868).

The spelling of 3128 in words is "three thousand, one hundred twenty-eight".

Divisors: 1 2 4 8 17 23 34 46 68 92 136 184 391 782 1564 3128