28913320012 has 24 divisors (see below), whose sum is σ = 50679064800. Its totient is φ = 14433611136.

The previous prime is 28913320001. The next prime is 28913320019. The reversal of 28913320012 is 21002331982.

It is not an unprimeable number, because it can be changed into a prime (28913320019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10655968 + ... + 10658680.

It is an arithmetic number, because the mean of its divisors is an integer number (2111627700).

Almost surely, 2^28913320012 is an apocalyptic number.

It is an amenable number.

28913320012 is a deficient number, since it is larger than the sum of its proper divisors (21765744788).

28913320012 is a wasteful number, since it uses less digits than its factorization.

28913320012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5985 (or 5983 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

Adding to 28913320012 its reverse (21002331982), we get a palindrome (49915651994).

The spelling of 28913320012 in words is "twenty-eight billion, nine hundred thirteen million, three hundred twenty thousand, twelve".