28086028 has 12 divisors (see below), whose sum is σ = 51737560. Its totient is φ = 13303872.

The previous prime is 28086017. The next prime is 28086049. The reversal of 28086028 is 82068082.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28085984 and 28086002.

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, 184701 + ... + 184852.

Almost surely, 2^28086028 is an apocalyptic number.

It is an amenable number.

28086028 is a deficient number, since it is larger than the sum of its proper divisors (23651532).

28086028 is a wasteful number, since it uses less digits than its factorization.

28086028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369576 (or 369574 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 28086028 is about 5299.6252697714. The cubic root of 28086028 is about 303.9695693224.

It can be divided in two parts, 2808 and 6028, that added together give a square (8836 = 94²).

The spelling of 28086028 in words is "twenty-eight million, eighty-six thousand, twenty-eight".