28855288 has 64 divisors (see below), whose sum is σ = 68140800. Its totient is φ = 11128320.

The previous prime is 28855283. The next prime is 28855291. The reversal of 28855288 is 88255882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28855283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85456 + ... + 85792.

It is an arithmetic number, because the mean of its divisors is an integer number (1064700).

Almost surely, 2^28855288 is an apocalyptic number.

28855288 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28855288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34070400).

28855288 is an abundant number, since it is smaller than the sum of its proper divisors (39285512).

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

28855288 is a wasteful number, since it uses less digits than its factorization.

28855288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500 (or 496 counting only the distinct ones).

The product of its digits is 409600, while the sum is 46.

The square root of 28855288 is about 5371.7118314370. The cubic root of 28855288 is about 306.7197944082.

The spelling of 28855288 in words is "twenty-eight million, eight hundred fifty-five thousand, two hundred eighty-eight".