28280973 has 16 divisors (see below), whose sum is σ = 43642880. Its totient is φ = 15955056.

The previous prime is 28280969. The next prime is 28280977. The reversal of 28280973 is 37908282.

It is an interprime number because it is at equal distance from previous prime (28280969) and next prime (28280977).

It is not a de Polignac number, because 28280973 - 2² = 28280969 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28280977) 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 15 ways as a sum of consecutive naturals, for example, 6865 + ... + 10182.

It is an arithmetic number, because the mean of its divisors is an integer number (2727680).

Almost surely, 2^28280973 is an apocalyptic number.

It is an amenable number.

28280973 is a deficient number, since it is larger than the sum of its proper divisors (15361907).

28280973 is a wasteful number, since it uses less digits than its factorization.

28280973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17136.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 28280973 is about 5317.9858029145. The cubic root of 28280973 is about 304.6712322307.

The spelling of 28280973 in words is "twenty-eight million, two hundred eighty thousand, nine hundred seventy-three".