28430100449 has 2 divisors, whose sum is σ = 28430100450. Its totient is φ = 28430100448.

The previous prime is 28430100437. The next prime is 28430100529. The reversal of 28430100449 is 94400103482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26241732049 + 2188368400 = 161993^2 + 46780^2 .

It is a cyclic number.

It is not a de Polignac number, because 28430100449 - 2²⁴ = 28413323233 is a prime.

It is a super-2 number, since 2×28430100449² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28430100409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14215050224 + 14215050225.

It is an arithmetic number, because the mean of its divisors is an integer number (14215050225).

Almost surely, 2^28430100449 is an apocalyptic number.

It is an amenable number.

28430100449 is a deficient number, since it is larger than the sum of its proper divisors (1).

28430100449 is an equidigital number, since it uses as much as digits as its factorization.

28430100449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 28430100449 in words is "twenty-eight billion, four hundred thirty million, one hundred thousand, four hundred forty-nine".