28200028 has 24 divisors (see below), whose sum is σ = 52935120. Its totient is φ = 13104000.

The previous prime is 28200023. The next prime is 28200071. The reversal of 28200028 is 82000282.

It is a junction number, because it is equal to n+sod(n) for n = 28199981 and 28200008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28200023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 528 + ... + 7528.

It is an arithmetic number, because the mean of its divisors is an integer number (2205630).

Almost surely, 2^28200028 is an apocalyptic number.

It is an amenable number.

28200028 is a deficient number, since it is larger than the sum of its proper divisors (24735092).

28200028 is a wasteful number, since it uses less digits than its factorization.

28200028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7077 (or 7075 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 28200028 is about 5310.3698552926. The cubic root of 28200028 is about 304.3802806786.

The spelling of 28200028 in words is "twenty-eight million, two hundred thousand, twenty-eight".