28331504874 has 24 divisors (see below), whose sum is σ = 62882122212. Its totient is φ = 9213497280.

The previous prime is 28331504863. The next prime is 28331504881. The reversal of 28331504874 is 47840513382.

It can be written as a sum of positive squares in 2 ways, for example, as 17762225625 + 10569279249 = 133275^2 + 102807^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 19194049 + ... + 19195524.

Almost surely, 2^28331504874 is an apocalyptic number.

28331504874 is an abundant number, since it is smaller than the sum of its proper divisors (34550617338).

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

28331504874 is a wasteful number, since it uses less digits than its factorization.

28331504874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38389622 (or 38389619 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 28331504874 in words is "twenty-eight billion, three hundred thirty-one million, five hundred four thousand, eight hundred seventy-four".