28438572293 has 2 divisors, whose sum is σ = 28438572294. Its totient is φ = 28438572292.

The previous prime is 28438572287. The next prime is 28438572299. The reversal of 28438572293 is 39227583482.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (28438572287) and next prime (28438572299).

It can be written as a sum of positive squares in only one way, i.e., 20051126404 + 8387445889 = 141602^2 + 91583^2 .

It is a cyclic number.

It is not a de Polignac number, because 28438572293 - 2⁸ = 28438572037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28438572299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14219286146 + 14219286147.

It is an arithmetic number, because the mean of its divisors is an integer number (14219286147).

Almost surely, 2^28438572293 is an apocalyptic number.

It is an amenable number.

28438572293 is a deficient number, since it is larger than the sum of its proper divisors (1).

28438572293 is an equidigital number, since it uses as much as digits as its factorization.

28438572293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5806080, while the sum is 53.

The spelling of 28438572293 in words is "twenty-eight billion, four hundred thirty-eight million, five hundred seventy-two thousand, two hundred ninety-three".