28701068447 has 4 divisors (see below), whose sum is σ = 28710578280. Its totient is φ = 28691558616.

The previous prime is 28701068441. The next prime is 28701068467. The reversal of 28701068447 is 74486010782.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28701068447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28701068441) 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, 4750388 + ... + 4756425.

It is an arithmetic number, because the mean of its divisors is an integer number (7177644570).

Almost surely, 2^28701068447 is an apocalyptic number.

28701068447 is a deficient number, since it is larger than the sum of its proper divisors (9509833).

28701068447 is an equidigital number, since it uses as much as digits as its factorization.

28701068447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9509832.

The product of its (nonzero) digits is 602112, while the sum is 47.

The spelling of 28701068447 in words is "twenty-eight billion, seven hundred one million, sixty-eight thousand, four hundred forty-seven".