28357688855 has 4 divisors (see below), whose sum is σ = 34029226632. Its totient is φ = 22686151080.

The previous prime is 28357688833. The next prime is 28357688861. The reversal of 28357688855 is 55888675382.

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

It is not a de Polignac number, because 28357688855 - 2¹⁴ = 28357672471 is a prime.

It is a super-2 number, since 2×28357688855² (a number of 22 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 = 28357688791 and 28357688800.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2835768881 + ... + 2835768890.

It is an arithmetic number, because the mean of its divisors is an integer number (8507306658).

Almost surely, 2^28357688855 is an apocalyptic number.

28357688855 is a deficient number, since it is larger than the sum of its proper divisors (5671537777).

28357688855 is an equidigital number, since it uses as much as digits as its factorization.

28357688855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5671537776.

The product of its digits is 129024000, while the sum is 65.

The spelling of 28357688855 in words is "twenty-eight billion, three hundred fifty-seven million, six hundred eighty-eight thousand, eight hundred fifty-five".