16728738 has 32 divisors (see below), whose sum is σ = 36916992. Its totient is φ = 5020800.

The previous prime is 16728709. The next prime is 16728739. The reversal of 16728738 is 83782761.

It is a self number, because there is not a number n which added to its sum of digits gives 16728738.

It is not an unprimeable number, because it can be changed into a prime (16728739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 583 + ... + 5813.

It is an arithmetic number, because the mean of its divisors is an integer number (1153656).

Almost surely, 2^16728738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16728738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18458496).

16728738 is an abundant number, since it is smaller than the sum of its proper divisors (20188254).

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

16728738 is a wasteful number, since it uses less digits than its factorization.

16728738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5290.

The product of its digits is 112896, while the sum is 42.

The square root of 16728738 is about 4090.0779943664. The cubic root of 16728738 is about 255.7531902684.

The spelling of 16728738 in words is "sixteen million, seven hundred twenty-eight thousand, seven hundred thirty-eight".