28252434449 has 2 divisors, whose sum is σ = 28252434450. Its totient is φ = 28252434448.

The previous prime is 28252434407. The next prime is 28252434461. The reversal of 28252434449 is 94443425282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25773091600 + 2479342849 = 160540^2 + 49793^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28252434449 is a prime.

It is not a weakly prime, because it can be changed into another prime (28252434499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14126217224 + 14126217225.

It is an arithmetic number, because the mean of its divisors is an integer number (14126217225).

Almost surely, 2^28252434449 is an apocalyptic number.

It is an amenable number.

28252434449 is a deficient number, since it is larger than the sum of its proper divisors (1).

28252434449 is an equidigital number, since it uses as much as digits as its factorization.

28252434449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2211840, while the sum is 47.

The spelling of 28252434449 in words is "twenty-eight billion, two hundred fifty-two million, four hundred thirty-four thousand, four hundred forty-nine".