28229637269 has 2 divisors, whose sum is σ = 28229637270. Its totient is φ = 28229637268.

The previous prime is 28229637263. The next prime is 28229637281. The reversal of 28229637269 is 96273692282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14741602225 + 13488035044 = 121415^2 + 116138^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28229637269 is a prime.

It is a super-2 number, since 2×28229637269² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28229637263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14114818634 + 14114818635.

It is an arithmetic number, because the mean of its divisors is an integer number (14114818635).

Almost surely, 2^28229637269 is an apocalyptic number.

It is an amenable number.

28229637269 is a deficient number, since it is larger than the sum of its proper divisors (1).

28229637269 is an equidigital number, since it uses as much as digits as its factorization.

28229637269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7838208, while the sum is 56.

The spelling of 28229637269 in words is "twenty-eight billion, two hundred twenty-nine million, six hundred thirty-seven thousand, two hundred sixty-nine".