28445248 has 56 divisors (see below), whose sum is σ = 61447680. Its totient is φ = 12986880.

The previous prime is 28445237. The next prime is 28445269. The reversal of 28445248 is 84254482.

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, 148833 + ... + 149023.

It is an arithmetic number, because the mean of its divisors is an integer number (1097280).

Almost surely, 2^28445248 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 28445248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30723840).

28445248 is an abundant number, since it is smaller than the sum of its proper divisors (33002432).

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

28445248 is a wasteful number, since it uses less digits than its factorization.

28445248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395 (or 385 counting only the distinct ones).

The product of its digits is 81920, while the sum is 37.

The square root of 28445248 is about 5333.4086661346. The cubic root of 28445248 is about 305.2600058251.

The spelling of 28445248 in words is "twenty-eight million, four hundred forty-five thousand, two hundred forty-eight".