28031263512 has 32 divisors (see below), whose sum is σ = 80089324800. Its totient is φ = 8008932384.

The previous prime is 28031263411. The next prime is 28031263537. The reversal of 28031263512 is 21536213082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83426212 + ... + 83426547.

It is an arithmetic number, because the mean of its divisors is an integer number (2502791400).

Almost surely, 2^28031263512 is an apocalyptic number.

It is an amenable number.

28031263512 is an abundant number, since it is smaller than the sum of its proper divisors (52058061288).

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

28031263512 is a wasteful number, since it uses less digits than its factorization.

28031263512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166852775 (or 166852771 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

Adding to 28031263512 its reverse (21536213082), we get a palindrome (49567476594).

The spelling of 28031263512 in words is "twenty-eight billion, thirty-one million, two hundred sixty-three thousand, five hundred twelve".