1428811999443 has 12 divisors (see below), whose sum is σ = 2063889836008. Its totient is φ = 952518126240.

The previous prime is 1428811999427. The next prime is 1428811999501. The reversal of 1428811999443 is 3449991188241.

1428811999443 is a `hidden beast` number, since 1 + 4 + 28 + 81 + 1 + 9 + 99 + 443 = 666.

It is not a de Polignac number, because 1428811999443 - 2⁴ = 1428811999427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1428811929443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1539730 + ... + 2286567.

Almost surely, 2^{1428811999443} is an apocalyptic number.

1428811999443 is a deficient number, since it is larger than the sum of its proper divisors (635077836565).

1428811999443 is a wasteful number, since it uses less digits than its factorization.

1428811999443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3867794 (or 3867791 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 63.

The spelling of 1428811999443 in words is "one trillion, four hundred twenty-eight billion, eight hundred eleven million, nine hundred ninety-nine thousand, four hundred forty-three".