28322857147 has 4 divisors (see below), whose sum is σ = 30501538480. Its totient is φ = 26144175816.

The previous prime is 28322857111. The next prime is 28322857153. The reversal of 28322857147 is 74175822382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74175822382 = 2 ⋅37087911191.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28322857147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28322857147.

It is not an unprimeable number, because it can be changed into a prime (28322857177) 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, 1089340647 + ... + 1089340672.

It is an arithmetic number, because the mean of its divisors is an integer number (7625384620).

Almost surely, 2^28322857147 is an apocalyptic number.

28322857147 is a deficient number, since it is larger than the sum of its proper divisors (2178681333).

28322857147 is a wasteful number, since it uses less digits than its factorization.

28322857147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2178681332.

The product of its digits is 1505280, while the sum is 49.

The spelling of 28322857147 in words is "twenty-eight billion, three hundred twenty-two million, eight hundred fifty-seven thousand, one hundred forty-seven".