28423502489 has 2 divisors, whose sum is σ = 28423502490. Its totient is φ = 28423502488.

The previous prime is 28423502467. The next prime is 28423502537. The reversal of 28423502489 is 98420532482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28201492489 + 222010000 = 167933^2 + 14900^2 .

It is a cyclic number.

It is not a de Polignac number, because 28423502489 - 2²⁸ = 28155067033 is a prime.

It is not a weakly prime, because it can be changed into another prime (28423502449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14211751244 + 14211751245.

It is an arithmetic number, because the mean of its divisors is an integer number (14211751245).

Almost surely, 2^28423502489 is an apocalyptic number.

It is an amenable number.

28423502489 is a deficient number, since it is larger than the sum of its proper divisors (1).

28423502489 is an equidigital number, since it uses as much as digits as its factorization.

28423502489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1105920, while the sum is 47.

The spelling of 28423502489 in words is "twenty-eight billion, four hundred twenty-three million, five hundred two thousand, four hundred eighty-nine".