28555056 has 60 divisors (see below), whose sum is σ = 81293160. Its totient is φ = 9354240.

The previous prime is 28555049. The next prime is 28555063. The reversal of 28555056 is 65055582.

It is an interprime number because it is at equal distance from previous prime (28555049) and next prime (28555063).

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 28555056.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6816 + ... + 10176.

It is an arithmetic number, because the mean of its divisors is an integer number (1354886).

Almost surely, 2^28555056 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 28555056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40646580).

28555056 is an abundant number, since it is smaller than the sum of its proper divisors (52738104).

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

28555056 is a wasteful number, since it uses less digits than its factorization.

28555056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3434 (or 3425 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

The square root of 28555056 is about 5343.6931049603. The cubic root of 28555056 is about 305.6523027536.

The spelling of 28555056 in words is "twenty-eight million, five hundred fifty-five thousand, fifty-six".