28532712772 has 12 divisors (see below), whose sum is σ = 49960939756. Its totient is φ = 14258158560.

The previous prime is 28532712751. The next prime is 28532712799. The reversal of 28532712772 is 27721723582.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 71673156 + 28461039616 = 8466^2 + 168704^2 .

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2041623 + ... + 2055550.

Almost surely, 2^28532712772 is an apocalyptic number.

It is an amenable number.

28532712772 is a deficient number, since it is larger than the sum of its proper divisors (21428226984).

28532712772 is a wasteful number, since it uses less digits than its factorization.

28532712772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4098918 (or 4098916 counting only the distinct ones).

The product of its digits is 658560, while the sum is 46.

The spelling of 28532712772 in words is "twenty-eight billion, five hundred thirty-two million, seven hundred twelve thousand, seven hundred seventy-two".