28888224 has 48 divisors (see below), whose sum is σ = 76531392. Its totient is φ = 9540608.

The previous prime is 28888201. The next prime is 28888259. The reversal of 28888224 is 42288882.

It is a tau number, because it is divible by the number of its divisors (48).

It is a nude number because it is divisible by every one of its digits.

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 7 ways as a sum of consecutive naturals, for example, 9517 + ... + 12179.

It is an arithmetic number, because the mean of its divisors is an integer number (1594404).

Almost surely, 2^28888224 is an apocalyptic number.

28888224 is a gapful number since it is divisible by the number (24) 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 28888224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38265696).

28888224 is an abundant number, since it is smaller than the sum of its proper divisors (47643168).

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

28888224 is a wasteful number, since it uses less digits than its factorization.

28888224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2789 (or 2781 counting only the distinct ones).

The product of its digits is 131072, while the sum is 42.

The square root of 28888224 is about 5374.7766465222. The cubic root of 28888224 is about 306.8364487281.

The spelling of 28888224 in words is "twenty-eight million, eight hundred eighty-eight thousand, two hundred twenty-four".