28344222061 has 4 divisors (see below), whose sum is σ = 28344666652. Its totient is φ = 28343777472.

The previous prime is 28344222047. The next prime is 28344222139. The reversal of 28344222061 is 16022244382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16022244382 = 2 ⋅8011122191.

It can be written as a sum of positive squares in 2 ways, for example, as 27062224036 + 1281998025 = 164506^2 + 35805^2 .

It is a cyclic number.

It is not a de Polignac number, because 28344222061 - 2²⁵ = 28310667629 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 (28344222031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106590 + ... + 260863.

It is an arithmetic number, because the mean of its divisors is an integer number (7086166663).

Almost surely, 2^28344222061 is an apocalyptic number.

It is an amenable number.

28344222061 is a deficient number, since it is larger than the sum of its proper divisors (444591).

28344222061 is an equidigital number, since it uses as much as digits as its factorization.

28344222061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444590.

The product of its (nonzero) digits is 36864, while the sum is 34.

It can be divided in two parts, 283442 and 22061, that added together give a palindrome (305503).

The spelling of 28344222061 in words is "twenty-eight billion, three hundred forty-four million, two hundred twenty-two thousand, sixty-one".