8129216 has 28 divisors (see below), whose sum is σ = 16367760. Its totient is φ = 4005120.

The previous prime is 8129203. The next prime is 8129221. The reversal of 8129216 is 6129218.

It is an alternating number because its digits alternate between even and odd.

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, 3650 + ... + 5438.

Almost surely, 2^8129216 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 8129216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8183880).

8129216 is an abundant number, since it is smaller than the sum of its proper divisors (8238544).

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

8129216 is a wasteful number, since it uses less digits than its factorization.

8129216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1872 (or 1862 counting only the distinct ones).

The product of its digits is 1728, while the sum is 29.

The square root of 8129216 is about 2851.1780021598. The cubic root of 8129216 is about 201.0710539780.

The spelling of 8129216 in words is "eight million, one hundred twenty-nine thousand, two hundred sixteen".