28208226 has 8 divisors (see below), whose sum is σ = 56416464. Its totient is φ = 9402740.

The previous prime is 28208207. The next prime is 28208227. The reversal of 28208226 is 62280282.

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

28208226 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 28208193 and 28208202.

It is not an unprimeable number, because it can be changed into a prime (28208227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2350680 + ... + 2350691.

It is an arithmetic number, because the mean of its divisors is an integer number (7052058).

Almost surely, 2^28208226 is an apocalyptic number.

28208226 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28208226 is a wasteful number, since it uses less digits than its factorization.

28208226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4701376.

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 28208226 is about 5311.1416851747. The cubic root of 28208226 is about 304.4097731763.

The spelling of 28208226 in words is "twenty-eight million, two hundred eight thousand, two hundred twenty-six".