28307573249 has 2 divisors, whose sum is σ = 28307573250. Its totient is φ = 28307573248.

The previous prime is 28307573209. The next prime is 28307573291. The reversal of 28307573249 is 94237570382.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23881066225 + 4426507024 = 154535^2 + 66532^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28307573249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28307573197 and 28307573206.

It is not a weakly prime, because it can be changed into another prime (28307573209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14153786624 + 14153786625.

It is an arithmetic number, because the mean of its divisors is an integer number (14153786625).

Almost surely, 2^28307573249 is an apocalyptic number.

It is an amenable number.

28307573249 is a deficient number, since it is larger than the sum of its proper divisors (1).

28307573249 is an equidigital number, since it uses as much as digits as its factorization.

28307573249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2540160, while the sum is 50.

The spelling of 28307573249 in words is "twenty-eight billion, three hundred seven million, five hundred seventy-three thousand, two hundred forty-nine".