28884472756 has 12 divisors (see below), whose sum is σ = 51501560292. Its totient is φ = 14169741248.

The previous prime is 28884472753. The next prime is 28884472769. The reversal of 28884472756 is 65727448882.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 24907152400 + 3977320356 = 157820^2 + 63066^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28884472694 and 28884472703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28884472751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68123545 + ... + 68123968.

It is an arithmetic number, because the mean of its divisors is an integer number (4291796691).

Almost surely, 2^28884472756 is an apocalyptic number.

It is an amenable number.

28884472756 is a deficient number, since it is larger than the sum of its proper divisors (22617087536).

28884472756 is a wasteful number, since it uses less digits than its factorization.

28884472756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136247570 (or 136247568 counting only the distinct ones).

The product of its digits is 48168960, while the sum is 61.

The spelling of 28884472756 in words is "twenty-eight billion, eight hundred eighty-four million, four hundred seventy-two thousand, seven hundred fifty-six".