28443288 has 32 divisors (see below), whose sum is σ = 71238960. Its totient is φ = 9463680.

The previous prime is 28443281. The next prime is 28443307. The reversal of 28443288 is 88234482.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28443281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24906 + ... + 26022.

Almost surely, 2^28443288 is an apocalyptic number.

It is an amenable number.

28443288 is an abundant number, since it is smaller than the sum of its proper divisors (42795672).

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

28443288 is a wasteful number, since it uses less digits than its factorization.

28443288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2187 (or 2183 counting only the distinct ones).

The product of its digits is 98304, while the sum is 39.

The square root of 28443288 is about 5333.2249155647. The cubic root of 28443288 is about 305.2529944214.

The spelling of 28443288 in words is "twenty-eight million, four hundred forty-three thousand, two hundred eighty-eight".