1285984443 has 8 divisors (see below), whose sum is σ = 1722773056. Its totient is φ = 853259400.

The previous prime is 1285984327. The next prime is 1285984457. The reversal of 1285984443 is 3444895821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1285984443 - 2¹⁸ = 1285722299 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1285984392 and 1285984401.

It is not an unprimeable number, because it can be changed into a prime (1285984463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1015153 + ... + 1016418.

It is an arithmetic number, because the mean of its divisors is an integer number (215346632).

Almost surely, 2^1285984443 is an apocalyptic number.

1285984443 is a deficient number, since it is larger than the sum of its proper divisors (436788613).

1285984443 is a wasteful number, since it uses less digits than its factorization.

1285984443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2031785.

The product of its digits is 1105920, while the sum is 48.

The square root of 1285984443 is about 35860.6252455252. The cubic root of 1285984443 is about 1087.4565286362.

The spelling of 1285984443 in words is "one billion, two hundred eighty-five million, nine hundred eighty-four thousand, four hundred forty-three".