28247304 has 48 divisors (see below), whose sum is σ = 72147600. Its totient is φ = 9216064.

The previous prime is 28247299. The next prime is 28247321. The reversal of 28247304 is 40374282.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67207 + ... + 67625.

It is an arithmetic number, because the mean of its divisors is an integer number (1503075).

Almost surely, 2^28247304 is an apocalyptic number.

28247304 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 28247304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36073800).

28247304 is an abundant number, since it is smaller than the sum of its proper divisors (43900296).

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

28247304 is a wasteful number, since it uses less digits than its factorization.

28247304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534 (or 477 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 28247304 is about 5314.8192819700. The cubic root of 28247304 is about 304.5502787169.

It can be divided in two parts, 282 and 47304, that added together give a triangular number (47586 = T₃₀₈).

The spelling of 28247304 in words is "twenty-eight million, two hundred forty-seven thousand, three hundred four".