28963216 has 20 divisors (see below), whose sum is σ = 56497500. Its totient is φ = 14383232.

The previous prime is 28963213. The next prime is 28963237. The reversal of 28963216 is 61236982.

It can be written as a sum of positive squares in 2 ways, for example, as 17673616 + 11289600 = 4204^2 + 3360^2 .

It is not an unprimeable number, because it can be changed into a prime (28963213) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 3691 + ... + 8458.

It is an arithmetic number, because the mean of its divisors is an integer number (2824875).

Almost surely, 2^28963216 is an apocalyptic number.

It is an amenable number.

28963216 is a deficient number, since it is larger than the sum of its proper divisors (27534284).

28963216 is a wasteful number, since it uses less digits than its factorization.

28963216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12306 (or 12300 counting only the distinct ones).

The product of its digits is 31104, while the sum is 37.

The square root of 28963216 is about 5381.7484147812. The cubic root of 28963216 is about 307.1017286400.

The spelling of 28963216 in words is "twenty-eight million, nine hundred sixty-three thousand, two hundred sixteen".