28568357357 has 4 divisors (see below), whose sum is σ = 28576415136. Its totient is φ = 28560299580.

The previous prime is 28568357341. The next prime is 28568357371. The reversal of 28568357357 is 75375386582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75375386582 = 2 ⋅37687693291.

It is a cyclic number.

It is not a de Polignac number, because 28568357357 - 2⁴ = 28568357341 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28568357296 and 28568357305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28568357327) 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, 4023569 + ... + 4030662.

It is an arithmetic number, because the mean of its divisors is an integer number (7144103784).

Almost surely, 2^28568357357 is an apocalyptic number.

It is an amenable number.

28568357357 is a deficient number, since it is larger than the sum of its proper divisors (8057779).

28568357357 is an equidigital number, since it uses as much as digits as its factorization.

28568357357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8057778.

The product of its digits is 42336000, while the sum is 59.

The spelling of 28568357357 in words is "twenty-eight billion, five hundred sixty-eight million, three hundred fifty-seven thousand, three hundred fifty-seven".