28422226 has 32 divisors (see below), whose sum is σ = 51499008. Its totient is φ = 11506320.

The previous prime is 28422221. The next prime is 28422259. The reversal of 28422226 is 62222482.

It is a junction number, because it is equal to n+sod(n) for n = 28422194 and 28422203.

It is not an unprimeable number, because it can be changed into a prime (28422221) 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 15 ways as a sum of consecutive naturals, for example, 17901 + ... + 19423.

It is an arithmetic number, because the mean of its divisors is an integer number (1609344).

Almost surely, 2^28422226 is an apocalyptic number.

28422226 is the 2666-th decagonal number.

28422226 is a deficient number, since it is larger than the sum of its proper divisors (23076782).

28422226 is a wasteful number, since it uses less digits than its factorization.

28422226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606.

The product of its digits is 6144, while the sum is 28.

The square root of 28422226 is about 5331.2499472450. The cubic root of 28422226 is about 305.1776301134.

The spelling of 28422226 in words is "twenty-eight million, four hundred twenty-two thousand, two hundred twenty-six".