28315222 has 8 divisors (see below), whose sum is σ = 45740016. Its totient is φ = 13068552.

The previous prime is 28315213. The next prime is 28315229. The reversal of 28315222 is 22251382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28315229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 544498 + ... + 544549.

It is an arithmetic number, because the mean of its divisors is an integer number (5717502).

Almost surely, 2^28315222 is an apocalyptic number.

28315222 is a deficient number, since it is larger than the sum of its proper divisors (17424794).

28315222 is a wasteful number, since it uses less digits than its factorization.

28315222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089062.

The product of its digits is 1920, while the sum is 25.

The square root of 28315222 is about 5321.2049387333. The cubic root of 28315222 is about 304.7941709009.

The spelling of 28315222 in words is "twenty-eight million, three hundred fifteen thousand, two hundred twenty-two".