28331362812 has 12 divisors (see below), whose sum is σ = 66106513256. Its totient is φ = 9443787600.

The previous prime is 28331362811. The next prime is 28331362817. The reversal of 28331362812 is 21826313382.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×28331362812² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28331362811) by changing a digit.

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, 1180473439 + ... + 1180473462.

Almost surely, 2^28331362812 is an apocalyptic number.

It is an amenable number.

28331362812 is an abundant number, since it is smaller than the sum of its proper divisors (37775150444).

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

28331362812 is a wasteful number, since it uses less digits than its factorization.

28331362812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2360946908 (or 2360946906 counting only the distinct ones).

The product of its digits is 82944, while the sum is 39.

The spelling of 28331362812 in words is "twenty-eight billion, three hundred thirty-one million, three hundred sixty-two thousand, eight hundred twelve".