28233888 has 24 divisors (see below), whose sum is σ = 74114208. Its totient is φ = 9411264.

The previous prime is 28233883. The next prime is 28233899. The reversal of 28233888 is 88833282.

It is a tau number, because it is divible by the number of its divisors (24).

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

It is not an unprimeable number, because it can be changed into a prime (28233883) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 146956 + ... + 147147.

It is an arithmetic number, because the mean of its divisors is an integer number (3088092).

Almost surely, 2^28233888 is an apocalyptic number.

It is an amenable number.

28233888 is an abundant number, since it is smaller than the sum of its proper divisors (45880320).

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

28233888 is a wasteful number, since it uses less digits than its factorization.

28233888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294116 (or 294108 counting only the distinct ones).

The product of its digits is 147456, while the sum is 42.

The square root of 28233888 is about 5313.5570007294. The cubic root of 28233888 is about 304.5020559016.

The spelling of 28233888 in words is "twenty-eight million, two hundred thirty-three thousand, eight hundred eighty-eight".