1289900068 has 48 divisors (see below), whose sum is σ = 2389207744. Its totient is φ = 608549760.

The previous prime is 1289900023. The next prime is 1289900081. The reversal of 1289900068 is 8600099821.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a junction number, because it is equal to n+sod(n) for n = 1289899997 and 1289900033.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 998503 + ... + 999793.

Almost surely, 2^1289900068 is an apocalyptic number.

It is an amenable number.

1289900068 is a deficient number, since it is larger than the sum of its proper divisors (1099307676).

1289900068 is a wasteful number, since it uses less digits than its factorization.

1289900068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1532 (or 1530 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 1289900068 is about 35915.1787967149. The cubic root of 1289900068 is about 1088.5591229856.

Adding to 1289900068 its reverse (8600099821), we get a palindrome (9889999889).

The spelling of 1289900068 in words is "one billion, two hundred eighty-nine million, nine hundred thousand, sixty-eight".