28316313212 has 12 divisors (see below), whose sum is σ = 54058416216. Its totient is φ = 12871051440.

The previous prime is 28316313191. The next prime is 28316313227. The reversal of 28316313212 is 21231361382.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321776243 + ... + 321776330.

It is an arithmetic number, because the mean of its divisors is an integer number (4504868018).

Almost surely, 2^28316313212 is an apocalyptic number.

28316313212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28316313212 is a deficient number, since it is larger than the sum of its proper divisors (25742103004).

28316313212 is a wasteful number, since it uses less digits than its factorization.

28316313212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643552588 (or 643552586 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

Adding to 28316313212 its reverse (21231361382), we get a palindrome (49547674594).

The spelling of 28316313212 in words is "twenty-eight billion, three hundred sixteen million, three hundred thirteen thousand, two hundred twelve".