28685547167 has 4 divisors (see below), whose sum is σ = 29226783960. Its totient is φ = 28144310376.

The previous prime is 28685547157. The next prime is 28685547197. The reversal of 28685547167 is 76174558682.

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

It is a cyclic number.

It is not a de Polignac number, because 28685547167 - 2⁴ = 28685547151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28685547127) 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, 270618317 + ... + 270618422.

It is an arithmetic number, because the mean of its divisors is an integer number (7306695990).

Almost surely, 2^28685547167 is an apocalyptic number.

28685547167 is a deficient number, since it is larger than the sum of its proper divisors (541236793).

28685547167 is an equidigital number, since it uses as much as digits as its factorization.

28685547167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541236792.

The product of its digits is 22579200, while the sum is 59.

The spelling of 28685547167 in words is "twenty-eight billion, six hundred eighty-five million, five hundred forty-seven thousand, one hundred sixty-seven".