28276440193 has 4 divisors (see below), whose sum is σ = 28966109508. Its totient is φ = 27586770880.

The previous prime is 28276440173. The next prime is 28276440197. The reversal of 28276440193 is 39104467282.

It is a happy number.

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 9493189489 + 18783250704 = 97433^2 + 137052^2 .

It is a cyclic number.

It is not a de Polignac number, because 28276440193 - 2¹⁷ = 28276309121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28276440197) 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, 344834596 + ... + 344834677.

It is an arithmetic number, because the mean of its divisors is an integer number (7241527377).

Almost surely, 2^28276440193 is an apocalyptic number.

It is an amenable number.

28276440193 is a deficient number, since it is larger than the sum of its proper divisors (689669315).

28276440193 is an equidigital number, since it uses as much as digits as its factorization.

28276440193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689669314.

The product of its (nonzero) digits is 580608, while the sum is 46.

The spelling of 28276440193 in words is "twenty-eight billion, two hundred seventy-six million, four hundred forty thousand, one hundred ninety-three".