28006912 has 40 divisors (see below), whose sum is σ = 58924800. Its totient is φ = 13261824.

The previous prime is 28006897. The next prime is 28006967. The reversal of 28006912 is 21960082.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8289 + ... + 11167.

It is an arithmetic number, because the mean of its divisors is an integer number (1473120).

Almost surely, 2^28006912 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 28006912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29462400).

28006912 is an abundant number, since it is smaller than the sum of its proper divisors (30917888).

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

28006912 is an equidigital number, since it uses as much as digits as its factorization.

28006912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2916 (or 2900 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 28006912 is about 5292.1557044365. The cubic root of 28006912 is about 303.6838819210.

Adding to 28006912 its reverse (21960082), we get a palindrome (49966994).

The spelling of 28006912 in words is "twenty-eight million, six thousand, nine hundred twelve".