28088222 has 8 divisors (see below), whose sum is σ = 42606000. Its totient is φ = 13886224.

The previous prime is 28088219. The next prime is 28088227. The reversal of 28088222 is 22288082.

It is a happy number.

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 (28088227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78722 + ... + 79077.

It is an arithmetic number, because the mean of its divisors is an integer number (5325750).

Almost surely, 2^28088222 is an apocalyptic number.

28088222 is a deficient number, since it is larger than the sum of its proper divisors (14517778).

28088222 is a wasteful number, since it uses less digits than its factorization.

28088222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157890.

The product of its (nonzero) digits is 8192, while the sum is 32.

The square root of 28088222 is about 5299.8322614966. The cubic root of 28088222 is about 303.9774841934.

The spelling of 28088222 in words is "twenty-eight million, eighty-eight thousand, two hundred twenty-two".