28111316 has 12 divisors (see below), whose sum is σ = 49232820. Its totient is φ = 14044800.

The previous prime is 28111271. The next prime is 28111331. The reversal of 28111316 is 61311182.

It can be written as a sum of positive squares in 2 ways, for example, as 6451600 + 21659716 = 2540^2 + 4654^2 .

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28111291 and 28111300.

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, 6866 + ... + 10166.

It is an arithmetic number, because the mean of its divisors is an integer number (4102735).

Almost surely, 2^28111316 is an apocalyptic number.

It is an amenable number.

28111316 is a deficient number, since it is larger than the sum of its proper divisors (21121504).

28111316 is a wasteful number, since it uses less digits than its factorization.

28111316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5434 (or 5432 counting only the distinct ones).

The product of its digits is 288, while the sum is 23.

The square root of 28111316 is about 5302.0105620415. The cubic root of 28111316 is about 304.0607709764.

Adding to 28111316 its reverse (61311182), we get a palindrome (89422498).

The spelling of 28111316 in words is "twenty-eight million, one hundred eleven thousand, three hundred sixteen".