28585874458573 has 4 divisors (see below), whose sum is σ = 28585991782620. Its totient is φ = 28585757134528.

The previous prime is 28585874458481. The next prime is 28585874458579. The reversal of 28585874458573 is 37585447858582.

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 23410240358569 + 5175634100004 = 4838413^2 + 2275002^2 .

It is a cyclic number.

It is not a de Polignac number, because 28585874458573 - 2²⁵ = 28585840904141 is a prime.

It is a super-2 number, since 2×28585874458573² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28585874458493 and 28585874458502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28585874458579) 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, 58295788 + ... + 58784101.

It is an arithmetic number, because the mean of its divisors is an integer number (7146497945655).

Almost surely, 2^{28585874458573} is an apocalyptic number.

It is an amenable number.

28585874458573 is a deficient number, since it is larger than the sum of its proper divisors (117324047).

28585874458573 is a wasteful number, since it uses less digits than its factorization.

28585874458573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117324046.

The product of its digits is 12042240000, while the sum is 79.

The spelling of 28585874458573 in words is "twenty-eight trillion, five hundred eighty-five billion, eight hundred seventy-four million, four hundred fifty-eight thousand, five hundred seventy-three".