28446538247 has 2 divisors, whose sum is σ = 28446538248. Its totient is φ = 28446538246.

The previous prime is 28446538223. The next prime is 28446538259. The reversal of 28446538247 is 74283564482.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28446538247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28446538217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14223269123 + 14223269124.

It is an arithmetic number, because the mean of its divisors is an integer number (14223269124).

Almost surely, 2^28446538247 is an apocalyptic number.

28446538247 is a deficient number, since it is larger than the sum of its proper divisors (1).

28446538247 is an equidigital number, since it uses as much as digits as its factorization.

28446538247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10321920, while the sum is 53.

The spelling of 28446538247 in words is "twenty-eight billion, four hundred forty-six million, five hundred thirty-eight thousand, two hundred forty-seven".