28856448 has 96 divisors (see below), whose sum is σ = 85407660. Its totient is φ = 9345024.

The previous prime is 28856441. The next prime is 28856461. The reversal of 28856448 is 84465882.

28856448 is a `hidden beast` number, since 2 + 88 + 564 + 4 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20142144 + 8714304 = 4488^2 + 2952^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (28856441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42286 + ... + 42962.

Almost surely, 2^28856448 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 28856448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42703830).

28856448 is an abundant number, since it is smaller than the sum of its proper divisors (56551212).

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

28856448 is a wasteful number, since it uses less digits than its factorization.

28856448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734 (or 719 counting only the distinct ones).

The product of its digits is 491520, while the sum is 45.

The square root of 28856448 is about 5371.8198033813. The cubic root of 28856448 is about 306.7239044601.

It can be divided in two parts, 288 and 56448, that multiplied together give a square (16257024 = 4032²).

The spelling of 28856448 in words is "twenty-eight million, eight hundred fifty-six thousand, four hundred forty-eight".