28839808 has 32 divisors (see below), whose sum is σ = 57760560. Its totient is φ = 14343168.

The previous prime is 28839793. The next prime is 28839847. The reversal of 28839808 is 80893882.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29341 + ... + 30307.

Almost surely, 2^28839808 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 28839808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28880280).

28839808 is an abundant number, since it is smaller than the sum of its proper divisors (28920752).

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

28839808 is an equidigital number, since it uses as much as digits as its factorization.

28839808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214 (or 1202 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 46.

The square root of 28839808 is about 5370.2707566751. The cubic root of 28839808 is about 306.6649359281.

The spelling of 28839808 in words is "twenty-eight million, eight hundred thirty-nine thousand, eight hundred eight".