28281028 has 12 divisors (see below), whose sum is σ = 50545152. Its totient is φ = 13839560.

The previous prime is 28280999. The next prime is 28281037. The reversal of 28281028 is 82018282.

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, 75028 + ... + 75403.

It is an arithmetic number, because the mean of its divisors is an integer number (4212096).

Almost surely, 2^28281028 is an apocalyptic number.

It is an amenable number.

28281028 is a deficient number, since it is larger than the sum of its proper divisors (22264124).

28281028 is a wasteful number, since it uses less digits than its factorization.

28281028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150482 (or 150480 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 31.

The square root of 28281028 is about 5317.9909740427. The cubic root of 28281028 is about 304.6714297358.

The spelling of 28281028 in words is "twenty-eight million, two hundred eighty-one thousand, twenty-eight".