28721497283 has 2 divisors, whose sum is σ = 28721497284. Its totient is φ = 28721497282.

The previous prime is 28721497249. The next prime is 28721497309. The reversal of 28721497283 is 38279412782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28721497283 - 2⁸ = 28721497027 is a prime.

It is not a weakly prime, because it can be changed into another prime (28721497223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14360748641 + 14360748642.

It is an arithmetic number, because the mean of its divisors is an integer number (14360748642).

Almost surely, 2^28721497283 is an apocalyptic number.

28721497283 is a deficient number, since it is larger than the sum of its proper divisors (1).

28721497283 is an equidigital number, since it uses as much as digits as its factorization.

28721497283 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2709504, while the sum is 53.

The spelling of 28721497283 in words is "twenty-eight billion, seven hundred twenty-one million, four hundred ninety-seven thousand, two hundred eighty-three".