28356226 has 12 divisors (see below), whose sum is σ = 43278102. Its totient is φ = 13934384.

The previous prime is 28356199. The next prime is 28356269. The reversal of 28356226 is 62265382.

It can be written as a sum of positive squares in only one way, i.e., 27573001 + 783225 = 5251^2 + 885^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28356191 and 28356200.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 4926 + ... + 8998.

Almost surely, 2^28356226 is an apocalyptic number.

28356226 is a deficient number, since it is larger than the sum of its proper divisors (14921876).

28356226 is an equidigital number, since it uses as much as digits as its factorization.

28356226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4193 (or 4134 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 28356226 is about 5325.0564316259. The cubic root of 28356226 is about 304.9412266936.

It can be divided in two parts, 28356 and 226, that added together give a palindrome (28582).

The spelling of 28356226 in words is "twenty-eight million, three hundred fifty-six thousand, two hundred twenty-six".