28497216 has 112 divisors (see below), whose sum is σ = 83685888. Its totient is φ = 8486400.

The previous prime is 28497197. The next prime is 28497239. The reversal of 28497216 is 61279482.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217471 + ... + 217601.

Almost surely, 2^28497216 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 28497216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41842944).

28497216 is an abundant number, since it is smaller than the sum of its proper divisors (55188672).

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

28497216 is a wasteful number, since it uses less digits than its factorization.

28497216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260 (or 250 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 28497216 is about 5338.2783741577. The cubic root of 28497216 is about 305.4457908231.

The spelling of 28497216 in words is "twenty-eight million, four hundred ninety-seven thousand, two hundred sixteen".