28771467239 has 2 divisors, whose sum is σ = 28771467240. Its totient is φ = 28771467238.

The previous prime is 28771467187. The next prime is 28771467287. The reversal of 28771467239 is 93276417782.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28771467239 - 2¹² = 28771463143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28771467289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14385733619 + 14385733620.

It is an arithmetic number, because the mean of its divisors is an integer number (14385733620).

Almost surely, 2^28771467239 is an apocalyptic number.

28771467239 is a deficient number, since it is larger than the sum of its proper divisors (1).

28771467239 is an equidigital number, since it uses as much as digits as its factorization.

28771467239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7112448, while the sum is 56.

The spelling of 28771467239 in words is "twenty-eight billion, seven hundred seventy-one million, four hundred sixty-seven thousand, two hundred thirty-nine".