28126238723029 has 2 divisors, whose sum is σ = 28126238723030. Its totient is φ = 28126238723028.

The previous prime is 28126238722991. The next prime is 28126238723081. The reversal of 28126238723029 is 92032783262182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23922516834225 + 4203721888804 = 4891065^2 + 2050298^2 .

It is a cyclic number.

It is not a de Polignac number, because 28126238723029 - 2¹¹ = 28126238720981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28126238123029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14063119361514 + 14063119361515.

It is an arithmetic number, because the mean of its divisors is an integer number (14063119361515).

Almost surely, 2^{28126238723029} is an apocalyptic number.

It is an amenable number.

28126238723029 is a deficient number, since it is larger than the sum of its proper divisors (1).

28126238723029 is an equidigital number, since it uses as much as digits as its factorization.

28126238723029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6967296, while the sum is 55.

The spelling of 28126238723029 in words is "twenty-eight trillion, one hundred twenty-six billion, two hundred thirty-eight million, seven hundred twenty-three thousand, twenty-nine".