28421056 has 14 divisors (see below), whose sum is σ = 56398160. Its totient is φ = 14210496.

The previous prime is 28421051. The next prime is 28421101. The reversal of 28421056 is 65012482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28421051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221976 + ... + 222103.

It is an arithmetic number, because the mean of its divisors is an integer number (4028440).

Almost surely, 2^28421056 is an apocalyptic number.

It is an amenable number.

28421056 is a deficient number, since it is larger than the sum of its proper divisors (27977104).

28421056 is an equidigital number, since it uses as much as digits as its factorization.

28421056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444091 (or 444081 counting only the distinct ones).

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

The square root of 28421056 is about 5331.1402157512. The cubic root of 28421056 is about 305.1734425136.

The spelling of 28421056 in words is "twenty-eight million, four hundred twenty-one thousand, fifty-six".