28222208 has 36 divisors (see below), whose sum is σ = 64386000. Its totient is φ = 12094464.

The previous prime is 28222177. The next prime is 28222217. The reversal of 28222208 is 80222282.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6083 + ... + 9666.

It is an arithmetic number, because the mean of its divisors is an integer number (1788500).

Almost surely, 2^28222208 is an apocalyptic number.

28222208 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28222208 is an abundant number, since it is smaller than the sum of its proper divisors (36163792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28222208 is an equidigital number, since it uses as much as digits as its factorization.

28222208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15772 (or 15758 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 28222208 is about 5312.4578115972. The cubic root of 28222208 is about 304.4600605689.

The spelling of 28222208 in words is "twenty-eight million, two hundred twenty-two thousand, two hundred eight".