1428346221089 has 4 divisors (see below), whose sum is σ = 1428709579440. Its totient is φ = 1427982862740.

The previous prime is 1428346221083. The next prime is 1428346221139. The reversal of 1428346221089 is 9801226438241.

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 a de Polignac number, because none of the positive numbers 2^k-1428346221089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1428346221083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181673279 + ... + 181681140.

It is an arithmetic number, because the mean of its divisors is an integer number (357177394860).

Almost surely, 2^{1428346221089} is an apocalyptic number.

It is an amenable number.

1428346221089 is a deficient number, since it is larger than the sum of its proper divisors (363358351).

1428346221089 is an equidigital number, since it uses as much as digits as its factorization.

1428346221089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363358350.

The product of its (nonzero) digits is 1327104, while the sum is 50.

The spelling of 1428346221089 in words is "one trillion, four hundred twenty-eight billion, three hundred forty-six million, two hundred twenty-one thousand, eighty-nine".