28710299549 has 2 divisors, whose sum is σ = 28710299550. Its totient is φ = 28710299548.

The previous prime is 28710299507. The next prime is 28710299593. The reversal of 28710299549 is 94599201782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23018351524 + 5691948025 = 151718^2 + 75445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28710299549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28710299494 and 28710299503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28710299249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14355149774 + 14355149775.

It is an arithmetic number, because the mean of its divisors is an integer number (14355149775).

Almost surely, 2^28710299549 is an apocalyptic number.

It is an amenable number.

28710299549 is a deficient number, since it is larger than the sum of its proper divisors (1).

28710299549 is an equidigital number, since it uses as much as digits as its factorization.

28710299549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3265920, while the sum is 56.

The spelling of 28710299549 in words is "twenty-eight billion, seven hundred ten million, two hundred ninety-nine thousand, five hundred forty-nine".