28897479882 has 24 divisors (see below), whose sum is σ = 63031421700. Its totient is φ = 9567844800.

The previous prime is 28897479851. The next prime is 28897479883.

28897479882 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 21220040241 + 7677439641 = 145671^2 + 87621^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28897479882.

It is not an unprimeable number, because it can be changed into a prime (28897479883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5384619 + ... + 5389982.

Almost surely, 2^28897479882 is an apocalyptic number.

28897479882 is an abundant number, since it is smaller than the sum of its proper divisors (34133941818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28897479882 is a wasteful number, since it uses less digits than its factorization.

28897479882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10774758 (or 10774755 counting only the distinct ones).

The product of its digits is 260112384, while the sum is 72.

The spelling of 28897479882 in words is "twenty-eight billion, eight hundred ninety-seven million, four hundred seventy-nine thousand, eight hundred eighty-two".