28256130 has 48 divisors (see below), whose sum is σ = 83962944. Its totient is φ = 6458400.

The previous prime is 28256119. The next prime is 28256131. The reversal of 28256130 is 3165282.

28256130 is a `hidden beast` number, since 28 + 25 + 613 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 28256094 and 28256103.

It is not an unprimeable number, because it can be changed into a prime (28256131) 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 23 ways as a sum of consecutive naturals, for example, 21796 + ... + 23055.

It is an arithmetic number, because the mean of its divisors is an integer number (1749228).

Almost surely, 2^28256130 is an apocalyptic number.

28256130 is an abundant number, since it is smaller than the sum of its proper divisors (55706814).

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

28256130 is a wasteful number, since it uses less digits than its factorization.

28256130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44871 (or 44868 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 28256130 is about 5315.6495369804. The cubic root of 28256130 is about 304.5819947921.

The spelling of 28256130 in words is "twenty-eight million, two hundred fifty-six thousand, one hundred thirty".