28622838281 has 2 divisors, whose sum is σ = 28622838282. Its totient is φ = 28622838280.

The previous prime is 28622838271. The next prime is 28622838317. The reversal of 28622838281 is 18283822682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16364805625 + 12258032656 = 127925^2 + 110716^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28622838281 is a prime.

It is a super-2 number, since 2×28622838281² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28622838271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14311419140 + 14311419141.

It is an arithmetic number, because the mean of its divisors is an integer number (14311419141).

Almost surely, 2^28622838281 is an apocalyptic number.

It is an amenable number.

28622838281 is a deficient number, since it is larger than the sum of its proper divisors (1).

28622838281 is an equidigital number, since it uses as much as digits as its factorization.

28622838281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1179648, while the sum is 50.

The spelling of 28622838281 in words is "twenty-eight billion, six hundred twenty-two million, eight hundred thirty-eight thousand, two hundred eighty-one".