28728382 has 16 divisors (see below), whose sum is σ = 44613504. Its totient is φ = 13860000.

The previous prime is 28728379. The next prime is 28728383. The reversal of 28728382 is 28382782.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28728383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40632 + ... + 41332.

It is an arithmetic number, because the mean of its divisors is an integer number (2788344).

Almost surely, 2^28728382 is an apocalyptic number.

28728382 is a deficient number, since it is larger than the sum of its proper divisors (15885122).

28728382 is a wasteful number, since it uses less digits than its factorization.

28728382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1395.

The product of its digits is 86016, while the sum is 40.

The square root of 28728382 is about 5359.8863793928. The cubic root of 28728382 is about 306.2694808099.

The spelling of 28728382 in words is "twenty-eight million, seven hundred twenty-eight thousand, three hundred eighty-two".