28056369469 has 2 divisors, whose sum is σ = 28056369470. Its totient is φ = 28056369468.

The previous prime is 28056369409. The next prime is 28056369491. The reversal of 28056369469 is 96496365082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14701562500 + 13354806969 = 121250^2 + 115563^2 .

It is a cyclic number.

It is not a de Polignac number, because 28056369469 - 2¹⁵ = 28056336701 is a prime.

It is a super-2 number, since 2×28056369469² (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 (28056369409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14028184734 + 14028184735.

It is an arithmetic number, because the mean of its divisors is an integer number (14028184735).

Almost surely, 2^28056369469 is an apocalyptic number.

It is an amenable number.

28056369469 is a deficient number, since it is larger than the sum of its proper divisors (1).

28056369469 is an equidigital number, since it uses as much as digits as its factorization.

28056369469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16796160, while the sum is 58.

The spelling of 28056369469 in words is "twenty-eight billion, fifty-six million, three hundred sixty-nine thousand, four hundred sixty-nine".