6115728 has 40 divisors (see below), whose sum is σ = 15965248. Its totient is φ = 2017152.

The previous prime is 6115717. The next prime is 6115741. The reversal of 6115728 is 8275116.

It is a Cunningham number, because it is equal to 2473²-1.

It is a junction number, because it is equal to n+sod(n) for n = 6115695 and 6115704.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4326 + ... + 5562.

Almost surely, 2^6115728 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 6115728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7982624).

6115728 is an abundant number, since it is smaller than the sum of its proper divisors (9849520).

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

6115728 is a wasteful number, since it uses less digits than its factorization.

6115728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351 (or 1345 counting only the distinct ones).

The product of its digits is 3360, while the sum is 30.

The square root of 6115728 is about 2472.9997978164. Note that the first 3 decimals coincide. The cubic root of 6115728 is about 182.8729148412.

The spelling of 6115728 in words is "six million, one hundred fifteen thousand, seven hundred twenty-eight".