28343288872 has 16 divisors (see below), whose sum is σ = 53200156500. Its totient is φ = 14156580480.

The previous prime is 28343288801. The next prime is 28343288891. The reversal of 28343288872 is 27888234382.

It can be written as a sum of positive squares in 2 ways, for example, as 27441247716 + 902041156 = 165654^2 + 30034^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1874997 + ... + 1890052.

Almost surely, 2^28343288872 is an apocalyptic number.

It is an amenable number.

28343288872 is a deficient number, since it is larger than the sum of its proper divisors (24856867628).

28343288872 is a wasteful number, since it uses less digits than its factorization.

28343288872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3765996 (or 3765992 counting only the distinct ones).

The product of its digits is 8257536, while the sum is 55.

The spelling of 28343288872 in words is "twenty-eight billion, three hundred forty-three million, two hundred eighty-eight thousand, eight hundred seventy-two".