16115728 has 40 divisors (see below), whose sum is σ = 33346080. Its totient is φ = 7518720.

The previous prime is 16115719. The next prime is 16115731. The reversal of 16115728 is 82751161.

It is a self number, because there is not a number n which added to its sum of digits gives 16115728.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48523 + ... + 48853.

It is an arithmetic number, because the mean of its divisors is an integer number (833652).

Almost surely, 2^16115728 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 16115728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16673040).

16115728 is an abundant number, since it is smaller than the sum of its proper divisors (17230352).

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

16115728 is a wasteful number, since it uses less digits than its factorization.

16115728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535 (or 529 counting only the distinct ones).

The product of its digits is 3360, while the sum is 31.

The square root of 16115728 is about 4014.4399360309. The cubic root of 16115728 is about 252.5902850026.

Adding to 16115728 its reverse (82751161), we get a palindrome (98866889).

It can be divided in two parts, 1 and 6115728, that added together give a square (6115729 = 2473²).

The spelling of 16115728 in words is "sixteen million, one hundred fifteen thousand, seven hundred twenty-eight".