28472175169 has 3 divisors (see below), whose sum is σ = 28472343907. Its totient is φ = 28472006432.

The previous prime is 28472175107. The next prime is 28472175197. The reversal of 28472175169 is 96157127482.

The square root of 28472175169 is 168737.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 8446529025 + 20025646144 = 91905^2 + 141512^2 .

It is a de Polignac number, because none of the positive numbers 2^k-28472175169 is a prime.

It is a super-2 number, since 2×28472175169² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28472175869) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 84369 + ... + 253105.

Almost surely, 2^28472175169 is an apocalyptic number.

28472175169 is the 168737-th square number.

28472175169 is the 84369-th centered octagonal number.

It is an amenable number.

28472175169 is a deficient number, since it is larger than the sum of its proper divisors (168738).

28472175169 is an frugal number, since it uses more digits than its factorization.

28472175169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337474 (or 168737 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 52.

The spelling of 28472175169 in words is "twenty-eight billion, four hundred seventy-two million, one hundred seventy-five thousand, one hundred sixty-nine".