28073073 has 32 divisors (see below), whose sum is σ = 45711360. Its totient is φ = 14978880.

The previous prime is 28073063. The next prime is 28073113. The reversal of 28073073 is 37037082.

It is not a de Polignac number, because 28073073 - 2⁴ = 28073057 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28073073.

It is not an unprimeable number, because it can be changed into a prime (28073033) 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 31 ways as a sum of consecutive naturals, for example, 18136 + ... + 19622.

It is an arithmetic number, because the mean of its divisors is an integer number (1428480).

Almost surely, 2^28073073 is an apocalyptic number.

It is an amenable number.

28073073 is a deficient number, since it is larger than the sum of its proper divisors (17638287).

28073073 is a wasteful number, since it uses less digits than its factorization.

28073073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1557.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 28073073 is about 5298.4028725645. The cubic root of 28073073 is about 303.9228256604.

The spelling of 28073073 in words is "twenty-eight million, seventy-three thousand, seventy-three".