28256122 has 8 divisors (see below), whose sum is σ = 42549876. Its totient is φ = 14072832.

The previous prime is 28256119. The next prime is 28256131. The reversal of 28256122 is 22165282.

It can be written as a sum of positive squares in 2 ways, for example, as 25918281 + 2337841 = 5091^2 + 1529^2 .

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

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, 26973 + ... + 28000.

Almost surely, 2^28256122 is an apocalyptic number.

28256122 is a deficient number, since it is larger than the sum of its proper divisors (14293754).

28256122 is a wasteful number, since it uses less digits than its factorization.

28256122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55232.

The product of its digits is 3840, while the sum is 28.

The square root of 28256122 is about 5315.6487844853. The cubic root of 28256122 is about 304.5819660472.

The spelling of 28256122 in words is "twenty-eight million, two hundred fifty-six thousand, one hundred twenty-two".