16506728 has 48 divisors (see below), whose sum is σ = 38136420. Its totient is φ = 6655488.

The previous prime is 16506703. The next prime is 16506739. The reversal of 16506728 is 82760561.

It can be written as a sum of positive squares in 2 ways, for example, as 16144324 + 362404 = 4018^2 + 602^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5426 + ... + 7902.

Almost surely, 2^16506728 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 16506728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19068210).

16506728 is an abundant number, since it is smaller than the sum of its proper divisors (21629692).

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

16506728 is a wasteful number, since it uses less digits than its factorization.

16506728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2514 (or 2503 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 16506728 is about 4062.8472774644. The cubic root of 16506728 is about 254.6167663835.

The spelling of 16506728 in words is "sixteen million, five hundred six thousand, seven hundred twenty-eight".