28910321222 has 4 divisors (see below), whose sum is σ = 43365481836. Its totient is φ = 14455160610.

The previous prime is 28910321213. The next prime is 28910321239. The reversal of 28910321222 is 22212301982.

It is a happy number.

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 (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7227580304 + ... + 7227580307.

It is an arithmetic number, because the mean of its divisors is an integer number (10841370459).

Almost surely, 2^28910321222 is an apocalyptic number.

28910321222 is a deficient number, since it is larger than the sum of its proper divisors (14455160614).

28910321222 is a wasteful number, since it uses less digits than its factorization.

28910321222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14455160613.

The product of its (nonzero) digits is 6912, while the sum is 32.

The spelling of 28910321222 in words is "twenty-eight billion, nine hundred ten million, three hundred twenty-one thousand, two hundred twenty-two".