1428437447989 has 4 divisors (see below), whose sum is σ = 1429186499424. Its totient is φ = 1427688396556.

The previous prime is 1428437447971. The next prime is 1428437447993. The reversal of 1428437447989 is 9897447348241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1428437447989 - 2⁷ = 1428437447861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428437447089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 374522857 + ... + 374526670.

It is an arithmetic number, because the mean of its divisors is an integer number (357296624856).

Almost surely, 2^{1428437447989} is an apocalyptic number.

It is an amenable number.

1428437447989 is a deficient number, since it is larger than the sum of its proper divisors (749051435).

1428437447989 is an equidigital number, since it uses as much as digits as its factorization.

1428437447989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749051434.

The product of its digits is 390168576, while the sum is 70.

The spelling of 1428437447989 in words is "one trillion, four hundred twenty-eight billion, four hundred thirty-seven million, four hundred forty-seven thousand, nine hundred eighty-nine".