28611811472 has 10 divisors (see below), whose sum is σ = 55435384758. Its totient is φ = 14305905728.

The previous prime is 28611811471. The next prime is 28611811483. The reversal of 28611811472 is 27411811682.

It can be written as a sum of positive squares in only one way, i.e., 22987411456 + 5624400016 = 151616^2 + 74996^2 .

It is not an unprimeable number, because it can be changed into a prime (28611811471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 894119093 + ... + 894119124.

Almost surely, 2^28611811472 is an apocalyptic number.

It is an amenable number.

28611811472 is a deficient number, since it is larger than the sum of its proper divisors (26823573286).

28611811472 is a wasteful number, since it uses less digits than its factorization.

28611811472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1788238225 (or 1788238219 counting only the distinct ones).

The product of its digits is 43008, while the sum is 41.

The spelling of 28611811472 in words is "twenty-eight billion, six hundred eleven million, eight hundred eleven thousand, four hundred seventy-two".