28288448 has 14 divisors (see below), whose sum is σ = 56135016. Its totient is φ = 14144192.

The previous prime is 28288439. The next prime is 28288499. The reversal of 28288448 is 84488282.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 28288399 and 28288408.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220940 + ... + 221067.

It is an arithmetic number, because the mean of its divisors is an integer number (4009644).

Almost surely, 2^28288448 is an apocalyptic number.

It is an amenable number.

28288448 is a deficient number, since it is larger than the sum of its proper divisors (27846568).

28288448 is an equidigital number, since it uses as much as digits as its factorization.

28288448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442019 (or 442009 counting only the distinct ones).

The product of its digits is 262144, while the sum is 44.

The square root of 28288448 is about 5318.6885601622. The cubic root of 28288448 is about 304.6980726184.

The spelling of 28288448 in words is "twenty-eight million, two hundred eighty-eight thousand, four hundred forty-eight".