28531254632 has 32 divisors (see below), whose sum is σ = 56654811720. Its totient is φ = 13423656960.

The previous prime is 28531254629. The next prime is 28531254737. The reversal of 28531254632 is 23645213582.

It can be written as a sum of positive squares in 4 ways, for example, as 27220380196 + 1310874436 = 164986^2 + 36206^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28531254632.

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, 720698 + ... + 759254.

Almost surely, 2^28531254632 is an apocalyptic number.

It is an amenable number.

28531254632 is a deficient number, since it is larger than the sum of its proper divisors (28123557088).

28531254632 is a wasteful number, since it uses less digits than its factorization.

28531254632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44021 (or 44017 counting only the distinct ones).

The product of its digits is 345600, while the sum is 41.

The spelling of 28531254632 in words is "twenty-eight billion, five hundred thirty-one million, two hundred fifty-four thousand, six hundred thirty-two".