28082379881 has 2 divisors, whose sum is σ = 28082379882. Its totient is φ = 28082379880.

The previous prime is 28082379839. The next prime is 28082379901. The reversal of 28082379881 is 18897328082.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25893637225 + 2188742656 = 160915^2 + 46784^2 .

It is a cyclic number.

It is not a de Polignac number, because 28082379881 - 2⁶ = 28082379817 is a prime.

It is a super-2 number, since 2×28082379881² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28082379811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14041189940 + 14041189941.

It is an arithmetic number, because the mean of its divisors is an integer number (14041189941).

Almost surely, 2^28082379881 is an apocalyptic number.

It is an amenable number.

28082379881 is a deficient number, since it is larger than the sum of its proper divisors (1).

28082379881 is an equidigital number, since it uses as much as digits as its factorization.

28082379881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3096576, while the sum is 56.

The spelling of 28082379881 in words is "twenty-eight billion, eighty-two million, three hundred seventy-nine thousand, eight hundred eighty-one".