28340022845 has 4 divisors (see below), whose sum is σ = 34008027420. Its totient is φ = 22672018272.

The previous prime is 28340022827. The next prime is 28340022877. The reversal of 28340022845 is 54822004382.

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 21831244516 + 6508778329 = 147754^2 + 80677^2 .

It is a cyclic number.

It is not a de Polignac number, because 28340022845 - 2²⁰ = 28338974269 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28340022799 and 28340022808.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2834002280 + ... + 2834002289.

It is an arithmetic number, because the mean of its divisors is an integer number (8502006855).

Almost surely, 2^28340022845 is an apocalyptic number.

It is an amenable number.

28340022845 is a deficient number, since it is larger than the sum of its proper divisors (5668004575).

28340022845 is an equidigital number, since it uses as much as digits as its factorization.

28340022845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5668004574.

The product of its (nonzero) digits is 122880, while the sum is 38.

The spelling of 28340022845 in words is "twenty-eight billion, three hundred forty million, twenty-two thousand, eight hundred forty-five".