28073028 has 24 divisors (see below), whose sum is σ = 67102560. Its totient is φ = 9129280.

The previous prime is 28073027. The next prime is 28073029. The reversal of 28073028 is 82037082.

It is an interprime number because it is at equal distance from previous prime (28073027) and next prime (28073029).

It is a junction number, because it is equal to n+sod(n) for n = 28072986 and 28073004.

It is not an unprimeable number, because it can be changed into a prime (28073021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28038 + ... + 29021.

It is an arithmetic number, because the mean of its divisors is an integer number (2795940).

Almost surely, 2^28073028 is an apocalyptic number.

It is an amenable number.

28073028 is an abundant number, since it is smaller than the sum of its proper divisors (39029532).

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

28073028 is a wasteful number, since it uses less digits than its factorization.

28073028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57107 (or 57105 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 28073028 is about 5298.3986260001. The cubic root of 28073028 is about 303.9226632683.

The spelling of 28073028 in words is "twenty-eight million, seventy-three thousand, twenty-eight".