28728368 has 20 divisors (see below), whose sum is σ = 58935960. Its totient is φ = 13519104.

The previous prime is 28728353. The next prime is 28728373. The reversal of 28728368 is 86382782.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52538 + ... + 53081.

It is an arithmetic number, because the mean of its divisors is an integer number (2946798).

Almost surely, 2^28728368 is an apocalyptic number.

It is an amenable number.

28728368 is an abundant number, since it is smaller than the sum of its proper divisors (30207592).

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

28728368 is a wasteful number, since it uses less digits than its factorization.

28728368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105644 (or 105638 counting only the distinct ones).

The product of its digits is 258048, while the sum is 44.

The square root of 28728368 is about 5359.8850733948. The cubic root of 28728368 is about 306.2694310592.

The spelling of 28728368 in words is "twenty-eight million, seven hundred twenty-eight thousand, three hundred sixty-eight".