28336987841 has 2 divisors, whose sum is σ = 28336987842. Its totient is φ = 28336987840.

The previous prime is 28336987837. The next prime is 28336987853. The reversal of 28336987841 is 14878963382.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26594760241 + 1742227600 = 163079^2 + 41740^2 .

It is a cyclic number.

It is not a de Polignac number, because 28336987841 - 2² = 28336987837 is a prime.

It is not a weakly prime, because it can be changed into another prime (28336987541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14168493920 + 14168493921.

It is an arithmetic number, because the mean of its divisors is an integer number (14168493921).

Almost surely, 2^28336987841 is an apocalyptic number.

It is an amenable number.

28336987841 is a deficient number, since it is larger than the sum of its proper divisors (1).

28336987841 is an equidigital number, since it uses as much as digits as its factorization.

28336987841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13934592, while the sum is 59.

The spelling of 28336987841 in words is "twenty-eight billion, three hundred thirty-six million, nine hundred eighty-seven thousand, eight hundred forty-one".