28728114 has 16 divisors (see below), whose sum is σ = 60480480. Its totient is φ = 9072000.

The previous prime is 28728097. The next prime is 28728121. The reversal of 28728114 is 41182782.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125887 + ... + 126114.

It is an arithmetic number, because the mean of its divisors is an integer number (3780030).

Almost surely, 2^28728114 is an apocalyptic number.

28728114 is an abundant number, since it is smaller than the sum of its proper divisors (31752366).

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

28728114 is a wasteful number, since it uses less digits than its factorization.

28728114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252025.

The product of its digits is 7168, while the sum is 33.

The square root of 28728114 is about 5359.8613788045. The cubic root of 28728114 is about 306.2685284361.

The spelling of 28728114 in words is "twenty-eight million, seven hundred twenty-eight thousand, one hundred fourteen".