28808304 has 80 divisors (see below), whose sum is σ = 86161152. Its totient is φ = 8123904.

The previous prime is 28808293. The next prime is 28808357. The reversal of 28808304 is 40380882.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27372 + ... + 28404.

Almost surely, 2^28808304 is an apocalyptic number.

28808304 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 28808304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43080576).

28808304 is an abundant number, since it is smaller than the sum of its proper divisors (57352848).

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

28808304 is a wasteful number, since it uses less digits than its factorization.

28808304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134 (or 1128 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 28808304 is about 5367.3367697584. The cubic root of 28808304 is about 306.5532304668.

The spelling of 28808304 in words is "twenty-eight million, eight hundred eight thousand, three hundred four".