28553856 has 128 divisors (see below), whose sum is σ = 81959040. Its totient is φ = 8785920.

The previous prime is 28553831. The next prime is 28553867. The reversal of 28553856 is 65835582.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 468066 + ... + 468126.

It is an arithmetic number, because the mean of its divisors is an integer number (640305).

Almost surely, 2^28553856 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 28553856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40979520).

28553856 is an abundant number, since it is smaller than the sum of its proper divisors (53405184).

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

28553856 is a wasteful number, since it uses less digits than its factorization.

28553856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 142 counting only the distinct ones).

The product of its digits is 288000, while the sum is 42.

The square root of 28553856 is about 5343.5808218834. The cubic root of 28553856 is about 305.6480211079.

The spelling of 28553856 in words is "twenty-eight million, five hundred fifty-three thousand, eight hundred fifty-six".