28332973 has 2 divisors, whose sum is σ = 28332974. Its totient is φ = 28332972.

The previous prime is 28332961. The next prime is 28332989. The reversal of 28332973 is 37923382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17489124 + 10843849 = 4182^2 + 3293^2 .

It is a cyclic number.

It is not a de Polignac number, because 28332973 - 2⁹ = 28332461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28332923) 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 as a sum of consecutive naturals, namely, 14166486 + 14166487.

It is an arithmetic number, because the mean of its divisors is an integer number (14166487).

Almost surely, 2^28332973 is an apocalyptic number.

It is an amenable number.

28332973 is a deficient number, since it is larger than the sum of its proper divisors (1).

28332973 is an equidigital number, since it uses as much as digits as its factorization.

28332973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 37.

The square root of 28332973 is about 5322.8726266932. The cubic root of 28332973 is about 304.8578500899.

The spelling of 28332973 in words is "twenty-eight million, three hundred thirty-two thousand, nine hundred seventy-three".