28343451667 has 4 divisors (see below), whose sum is σ = 28346377680. Its totient is φ = 28340525656.

The previous prime is 28343451641. The next prime is 28343451709. The reversal of 28343451667 is 76615434382.

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 28343451667 - 2¹¹ = 28343449619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28343451667.

It is not an unprimeable number, because it can be changed into a prime (28343551667) 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, 1448428 + ... + 1467865.

It is an arithmetic number, because the mean of its divisors is an integer number (7086594420).

Almost surely, 2^28343451667 is an apocalyptic number.

28343451667 is a deficient number, since it is larger than the sum of its proper divisors (2926013).

28343451667 is an equidigital number, since it uses as much as digits as its factorization.

28343451667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2926012.

The product of its digits is 2903040, while the sum is 49.

The spelling of 28343451667 in words is "twenty-eight billion, three hundred forty-three million, four hundred fifty-one thousand, six hundred sixty-seven".