28717174573 has 4 divisors (see below), whose sum is σ = 28718427420. Its totient is φ = 28715921728.

The previous prime is 28717174547. The next prime is 28717174637. The reversal of 28717174573 is 37547171782.

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

It can be written as a sum of positive squares in 2 ways, for example, as 26087741289 + 2629433284 = 161517^2 + 51278^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28717174573 is a prime.

It is a super-2 number, since 2×28717174573² (a number of 22 digits) contains 22 as substring.

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 28717174573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28717174523) 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, 591388 + ... + 638101.

It is an arithmetic number, because the mean of its divisors is an integer number (7179606855).

Almost surely, 2^28717174573 is an apocalyptic number.

It is an amenable number.

28717174573 is a deficient number, since it is larger than the sum of its proper divisors (1252847).

28717174573 is a wasteful number, since it uses less digits than its factorization.

28717174573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252846.

The product of its digits is 2304960, while the sum is 52.

The spelling of 28717174573 in words is "twenty-eight billion, seven hundred seventeen million, one hundred seventy-four thousand, five hundred seventy-three".