28320641141 has 4 divisors (see below), whose sum is σ = 30499152012. Its totient is φ = 26142130272.

The previous prime is 28320641137. The next prime is 28320641161. The reversal of 28320641141 is 14114602382.

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 15638502916 + 12682138225 = 125054^2 + 112615^2 .

It is a cyclic number.

It is not a de Polignac number, because 28320641141 - 2² = 28320641137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28320641098 and 28320641107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28320641161) 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, 1089255416 + ... + 1089255441.

It is an arithmetic number, because the mean of its divisors is an integer number (7624788003).

Almost surely, 2^28320641141 is an apocalyptic number.

It is an amenable number.

28320641141 is a deficient number, since it is larger than the sum of its proper divisors (2178510871).

28320641141 is a wasteful number, since it uses less digits than its factorization.

28320641141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2178510870.

The product of its (nonzero) digits is 9216, while the sum is 32.

The spelling of 28320641141 in words is "twenty-eight billion, three hundred twenty million, six hundred forty-one thousand, one hundred forty-one".