16728772 has 6 divisors (see below), whose sum is σ = 29275358. Its totient is φ = 8364384.

The previous prime is 16728769. The next prime is 16728793. The reversal of 16728772 is 27782761.

It can be written as a sum of positive squares in only one way, i.e., 10458756 + 6270016 = 3234^2 + 2504^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2091093 + ... + 2091100.

Almost surely, 2^16728772 is an apocalyptic number.

It is an amenable number.

16728772 is a deficient number, since it is larger than the sum of its proper divisors (12546586).

16728772 is a wasteful number, since it uses less digits than its factorization.

16728772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4182197 (or 4182195 counting only the distinct ones).

The product of its digits is 65856, while the sum is 40.

The square root of 16728772 is about 4090.0821507642. The cubic root of 16728772 is about 255.7533635351.

The spelling of 16728772 in words is "sixteen million, seven hundred twenty-eight thousand, seven hundred seventy-two".