28331877312 has 42 divisors (see below), whose sum is σ = 81208212488. Its totient is φ = 9443958912.

The previous prime is 28331877257. The next prime is 28331877317. The reversal of 28331877312 is 21377813382.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28331877317) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24593068 + ... + 24594219.

Almost surely, 2^28331877312 is an apocalyptic number.

It is an amenable number.

28331877312 is an abundant number, since it is smaller than the sum of its proper divisors (52876335176).

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

28331877312 is a wasteful number, since it uses less digits than its factorization.

28331877312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49187305 (or 49187292 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The spelling of 28331877312 in words is "twenty-eight billion, three hundred thirty-one million, eight hundred seventy-seven thousand, three hundred twelve".