28273266 has 32 divisors (see below), whose sum is σ = 71806080. Its totient is φ = 8077968.

The previous prime is 28273249. The next prime is 28273277. The reversal of 28273266 is 66237282.

It is a self number, because there is not a number n which added to its sum of digits gives 28273266.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37021 + ... + 37776.

It is an arithmetic number, because the mean of its divisors is an integer number (2243940).

Almost surely, 2^28273266 is an apocalyptic number.

28273266 is an abundant number, since it is smaller than the sum of its proper divisors (43532814).

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

28273266 is a wasteful number, since it uses less digits than its factorization.

28273266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74815 (or 74809 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 28273266 is about 5317.2611370893. The cubic root of 28273266 is about 304.6435538511.

The spelling of 28273266 in words is "twenty-eight million, two hundred seventy-three thousand, two hundred sixty-six".