28119208 has 32 divisors (see below), whose sum is σ = 57362760. Its totient is φ = 12844800.

The previous prime is 28119199. The next prime is 28119227. The reversal of 28119208 is 80291182.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18645124 + 9474084 = 4318^2 + 3078^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28119208.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9166 + ... + 11842.

Almost surely, 2^28119208 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 28119208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28681380).

28119208 is an abundant number, since it is smaller than the sum of its proper divisors (29243552).

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

28119208 is a wasteful number, since it uses less digits than its factorization.

28119208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2797 (or 2793 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 28119208 is about 5302.7547557850. The cubic root of 28119208 is about 304.0892224261.

The spelling of 28119208 in words is "twenty-eight million, one hundred nineteen thousand, two hundred eight".