28769222 has 4 divisors (see below), whose sum is σ = 43153836. Its totient is φ = 14384610.

The previous prime is 28769207. The next prime is 28769233. The reversal of 28769222 is 22296782.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7192304 + ... + 7192307.

It is an arithmetic number, because the mean of its divisors is an integer number (10788459).

Almost surely, 2^28769222 is an apocalyptic number.

28769222 is a deficient number, since it is larger than the sum of its proper divisors (14384614).

28769222 is a wasteful number, since it uses less digits than its factorization.

28769222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14384613.

The product of its digits is 48384, while the sum is 38.

The square root of 28769222 is about 5363.6948086184. The cubic root of 28769222 is about 306.4145420385.

The spelling of 28769222 in words is "twenty-eight million, seven hundred sixty-nine thousand, two hundred twenty-two".