28056226 has 8 divisors (see below), whose sum is σ = 45910224. Its totient is φ = 12752820.

The previous prime is 28056221. The next prime is 28056257. The reversal of 28056226 is 62265082.

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

It is not an unprimeable number, because it can be changed into a prime (28056221) 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 3 ways as a sum of consecutive naturals, for example, 637620 + ... + 637663.

It is an arithmetic number, because the mean of its divisors is an integer number (5738778).

Almost surely, 2^28056226 is an apocalyptic number.

28056226 is a deficient number, since it is larger than the sum of its proper divisors (17853998).

28056226 is a wasteful number, since it uses less digits than its factorization.

28056226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275296.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 28056226 is about 5296.8128152692. The cubic root of 28056226 is about 303.8620175399.

Subtracting 28056226 from its reverse (62265082), we obtain a triangular number (34208856 = T₈₂₇₁).

It can be divided in two parts, 28056 and 226, that added together give a palindrome (28282).

The spelling of 28056226 in words is "twenty-eight million, fifty-six thousand, two hundred twenty-six".