28513248 has 48 divisors (see below), whose sum is σ = 75232080. Its totient is φ = 9455616.

The previous prime is 28513229. The next prime is 28513259. The reversal of 28513248 is 84231582.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21336 + ... + 22632.

It is an arithmetic number, because the mean of its divisors is an integer number (1567335).

Almost surely, 2^28513248 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 28513248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37616040).

28513248 is an abundant number, since it is smaller than the sum of its proper divisors (46718832).

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

28513248 is a wasteful number, since it uses less digits than its factorization.

28513248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539 (or 1531 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The square root of 28513248 is about 5339.7797707396. The cubic root of 28513248 is about 305.5030594454.

The spelling of 28513248 in words is "twenty-eight million, five hundred thirteen thousand, two hundred forty-eight".