28319216 has 20 divisors (see below), whose sum is σ = 55121472. Its totient is φ = 14094336.

The previous prime is 28319191. The next prime is 28319231. The reversal of 28319216 is 61291382.

It is a congruent 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, 401 + ... + 7536.

Almost surely, 2^28319216 is an apocalyptic number.

It is an amenable number.

28319216 is a deficient number, since it is larger than the sum of its proper divisors (26802256).

28319216 is a wasteful number, since it uses less digits than its factorization.

28319216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8168 (or 8162 counting only the distinct ones).

The product of its digits is 5184, while the sum is 32.

The square root of 28319216 is about 5321.5802164395. The cubic root of 28319216 is about 304.8085011280.

The spelling of 28319216 in words is "twenty-eight million, three hundred nineteen thousand, two hundred sixteen".