28253222 has 4 divisors (see below), whose sum is σ = 42379836. Its totient is φ = 14126610.

The previous prime is 28253207. The next prime is 28253233. The reversal of 28253222 is 22235282.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 28253191 and 28253200.

It is a congruent number.

It is an unprimeable number.

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, 7063304 + ... + 7063307.

It is an arithmetic number, because the mean of its divisors is an integer number (10594959).

Almost surely, 2^28253222 is an apocalyptic number.

28253222 is a deficient number, since it is larger than the sum of its proper divisors (14126614).

28253222 is a wasteful number, since it uses less digits than its factorization.

28253222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14126613.

The product of its digits is 3840, while the sum is 26.

The square root of 28253222 is about 5315.3759979892. The cubic root of 28253222 is about 304.5715456750.

The spelling of 28253222 in words is "twenty-eight million, two hundred fifty-three thousand, two hundred twenty-two".