28282028 has 6 divisors (see below), whose sum is σ = 49493556. Its totient is φ = 14141012.

The previous prime is 28282021. The next prime is 28282043. The reversal of 28282028 is 82028282.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28281985 and 28282003.

It is not an unprimeable number, because it can be changed into a prime (28282021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3535250 + ... + 3535257.

It is an arithmetic number, because the mean of its divisors is an integer number (8248926).

Almost surely, 2^28282028 is an apocalyptic number.

It is an amenable number.

28282028 is a deficient number, since it is larger than the sum of its proper divisors (21211528).

28282028 is a wasteful number, since it uses less digits than its factorization.

28282028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7070511 (or 7070509 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 32.

The square root of 28282028 is about 5318.0849936796. The cubic root of 28282028 is about 304.6750206925.

The spelling of 28282028 in words is "twenty-eight million, two hundred eighty-two thousand, twenty-eight".