5581128 has 64 divisors (see below), whose sum is σ = 16128000. Its totient is φ = 1576512.

The previous prime is 5581091. The next prime is 5581129. The reversal of 5581128 is 8211855.

It is a super-2 number, since 2×5581128² = 62297979504768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 5581095 and 5581104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5581129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23233 + ... + 23471.

It is an arithmetic number, because the mean of its divisors is an integer number (252000).

Almost surely, 2^5581128 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 5581128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8064000).

5581128 is an abundant number, since it is smaller than the sum of its proper divisors (10546872).

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

5581128 is a wasteful number, since it uses less digits than its factorization.

5581128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394 (or 390 counting only the distinct ones).

The product of its digits is 3200, while the sum is 30.

The square root of 5581128 is about 2362.4411103771. The cubic root of 5581128 is about 177.3810934104.

The spelling of 5581128 in words is "five million, five hundred eighty-one thousand, one hundred twenty-eight".