28058256 has 60 divisors (see below), whose sum is σ = 78923520. Its totient is φ = 9305280.

The previous prime is 28058249. The next prime is 28058257. The reversal of 28058256 is 65285082.

28058256 is a `hidden beast` number, since 28 + 0 + 582 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28058256.

It is not an unprimeable number, because it can be changed into a prime (28058257) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38665 + ... + 39383.

It is an arithmetic number, because the mean of its divisors is an integer number (1315392).

Almost surely, 2^28058256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28058256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39461760).

28058256 is an abundant number, since it is smaller than the sum of its proper divisors (50865264).

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

28058256 is a wasteful number, since it uses less digits than its factorization.

28058256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004 (or 995 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 28058256 is about 5297.0044364716. The cubic root of 28058256 is about 303.8693459789.

The spelling of 28058256 in words is "twenty-eight million, fifty-eight thousand, two hundred fifty-six".