28447070272 has 14 divisors (see below), whose sum is σ = 56449655198. Its totient is φ = 14223535104.

The previous prime is 28447070257. The next prime is 28447070293. The reversal of 28447070272 is 27207074482.

It can be written as a sum of positive squares in only one way, i.e., 24465965056 + 3981105216 = 156416^2 + 63096^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222242673 + ... + 222242800.

Almost surely, 2^28447070272 is an apocalyptic number.

It is an amenable number.

28447070272 is a deficient number, since it is larger than the sum of its proper divisors (28002584926).

28447070272 is an equidigital number, since it uses as much as digits as its factorization.

28447070272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444485485 (or 444485475 counting only the distinct ones).

The product of its (nonzero) digits is 351232, while the sum is 43.

The spelling of 28447070272 in words is "twenty-eight billion, four hundred forty-seven million, seventy thousand, two hundred seventy-two".