28600317428861 has 4 divisors (see below), whose sum is σ = 28600800332412. Its totient is φ = 28599834525312.

The previous prime is 28600317428833. The next prime is 28600317428873. The reversal of 28600317428861 is 16882471300682.

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 11735077922500 + 16865239506361 = 3425650^2 + 4106731^2 .

It is a cyclic number.

It is not a de Polignac number, because 28600317428861 - 2⁶ = 28600317428797 is a prime.

It is a super-2 number, since 2×28600317428861² (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 = 28600317428797 and 28600317428806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28600317428801) 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, 241362926 + ... + 241481391.

It is an arithmetic number, because the mean of its divisors is an integer number (7150200083103).

Almost surely, 2^{28600317428861} is an apocalyptic number.

It is an amenable number.

28600317428861 is a deficient number, since it is larger than the sum of its proper divisors (482903551).

28600317428861 is an equidigital number, since it uses as much as digits as its factorization.

28600317428861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482903550.

The product of its (nonzero) digits is 6193152, while the sum is 56.

The spelling of 28600317428861 in words is "twenty-eight trillion, six hundred billion, three hundred seventeen million, four hundred twenty-eight thousand, eight hundred sixty-one".