28550430772 has 6 divisors (see below), whose sum is σ = 49963253858. Its totient is φ = 14275215384.

The previous prime is 28550430767. The next prime is 28550430781. The reversal of 28550430772 is 27703405582.

It can be written as a sum of positive squares in only one way, i.e., 28373381136 + 177049636 = 168444^2 + 13306^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3568803843 + ... + 3568803850.

Almost surely, 2^28550430772 is an apocalyptic number.

It is an amenable number.

28550430772 is a deficient number, since it is larger than the sum of its proper divisors (21412823086).

28550430772 is a wasteful number, since it uses less digits than its factorization.

28550430772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7137607697 (or 7137607695 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 43.

The spelling of 28550430772 in words is "twenty-eight billion, five hundred fifty million, four hundred thirty thousand, seven hundred seventy-two".