1289231989228 has 24 divisors (see below), whose sum is σ = 2269092243600. Its totient is φ = 640930377408.

The previous prime is 1289231989211. The next prime is 1289231989247. The reversal of 1289231989228 is 8229891329821.

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1289231989228.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 813618 + ... + 1800121.

It is an arithmetic number, because the mean of its divisors is an integer number (94545510150).

Almost surely, 2^{1289231989228} is an apocalyptic number.

It is an amenable number.

1289231989228 is a deficient number, since it is larger than the sum of its proper divisors (979860254372).

1289231989228 is a wasteful number, since it uses less digits than its factorization.

1289231989228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2614449 (or 2614447 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 64.

The spelling of 1289231989228 in words is "one trillion, two hundred eighty-nine billion, two hundred thirty-one million, nine hundred eighty-nine thousand, two hundred twenty-eight".