28073268 has 72 divisors (see below), whose sum is σ = 73364928. Its totient is φ = 9047808.

The previous prime is 28073267. The next prime is 28073293. The reversal of 28073268 is 86237082.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28073263) 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 23 ways as a sum of consecutive naturals, for example, 248380 + ... + 248492.

Almost surely, 2^28073268 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28073268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36682464).

28073268 is an abundant number, since it is smaller than the sum of its proper divisors (45291660).

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

28073268 is a wasteful number, since it uses less digits than its factorization.

28073268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 28073268 is about 5298.4212743043. The cubic root of 28073268 is about 303.9235293574.

The spelling of 28073268 in words is "twenty-eight million, seventy-three thousand, two hundred sixty-eight".