28311443317412 has 12 divisors (see below), whose sum is σ = 49576324000896. Its totient is φ = 14146779317160.

The previous prime is 28311443317357. The next prime is 28311443317447. The reversal of 28311443317412 is 21471334411382.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2235578264 + ... + 2235590927.

It is an arithmetic number, because the mean of its divisors is an integer number (4131360333408).

Almost surely, 2^{28311443317412} is an apocalyptic number.

It is an amenable number.

28311443317412 is a deficient number, since it is larger than the sum of its proper divisors (21264880683484).

28311443317412 is a wasteful number, since it uses less digits than its factorization.

28311443317412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4471170778 (or 4471170776 counting only the distinct ones).

The product of its digits is 387072, while the sum is 44.

Adding to 28311443317412 its reverse (21471334411382), we get a palindrome (49782777728794).

The spelling of 28311443317412 in words is "twenty-eight trillion, three hundred eleven billion, four hundred forty-three million, three hundred seventeen thousand, four hundred twelve".