28684356941 has 4 divisors (see below), whose sum is σ = 28686207900. Its totient is φ = 28682505984.

The previous prime is 28684356937. The next prime is 28684356959. The reversal of 28684356941 is 14965348682.

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 28301332900 + 383024041 = 168230^2 + 19571^2 .

It is a cyclic number.

It is not a de Polignac number, because 28684356941 - 2² = 28684356937 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 (28684356931) by changing a digit.

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, 902036 + ... + 933293.

It is an arithmetic number, because the mean of its divisors is an integer number (7171551975).

Almost surely, 2^28684356941 is an apocalyptic number.

It is an amenable number.

28684356941 is a deficient number, since it is larger than the sum of its proper divisors (1850959).

28684356941 is a wasteful number, since it uses less digits than its factorization.

28684356941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850958.

The product of its digits is 9953280, while the sum is 56.

The spelling of 28684356941 in words is "twenty-eight billion, six hundred eighty-four million, three hundred fifty-six thousand, nine hundred forty-one".