28728016 has 20 divisors (see below), whose sum is σ = 55880352. Its totient is φ = 14307296.

The previous prime is 28728013. The next prime is 28728023. The reversal of 28728016 is 61082782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28728013) 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 3 ways as a sum of consecutive naturals, for example, 795 + ... + 7621.

Almost surely, 2^28728016 is an apocalyptic number.

It is an amenable number.

28728016 is a deficient number, since it is larger than the sum of its proper divisors (27152336).

28728016 is a wasteful number, since it uses less digits than its factorization.

28728016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7098 (or 7092 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 28728016 is about 5359.8522367692. The cubic root of 28728016 is about 306.2681801785.

It can be divided in two parts, 287280 and 16, that added together give a square (287296 = 536²).

The spelling of 28728016 in words is "twenty-eight million, seven hundred twenty-eight thousand, sixteen".