28016304 has 20 divisors (see below), whose sum is σ = 72375576. Its totient is φ = 9338752.

The previous prime is 28016299. The next prime is 28016311. The reversal of 28016304 is 40361082.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 291789 + ... + 291884.

Almost surely, 2^28016304 is an apocalyptic number.

28016304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28016304 is an abundant number, since it is smaller than the sum of its proper divisors (44359272).

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

28016304 is a wasteful number, since it uses less digits than its factorization.

28016304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583684 (or 583678 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 28016304 is about 5293.0429811215. The cubic root of 28016304 is about 303.7178244975.

Adding to 28016304 its reverse (40361082), we get a palindrome (68377386).

The spelling of 28016304 in words is "twenty-eight million, sixteen thousand, three hundred four".