1289229888 has 28 divisors (see below), whose sum is σ = 3411087920. Its totient is φ = 429743232.

The previous prime is 1289229863. The next prime is 1289229911. The reversal of 1289229888 is 8889229821.

It is a super-2 number, since 2×1289229888² = 3324227408224985088, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 3357178 + ... + 3357561.

Almost surely, 2^1289229888 is an apocalyptic number.

It is an amenable number.

1289229888 is an abundant number, since it is smaller than the sum of its proper divisors (2121858032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1289229888 is an equidigital number, since it uses as much as digits as its factorization.

1289229888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6714754 (or 6714744 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 57.

The square root of 1289229888 is about 35905.8475460474. The cubic root of 1289229888 is about 1088.3705665352.

The spelling of 1289229888 in words is "one billion, two hundred eighty-nine million, two hundred twenty-nine thousand, eight hundred eighty-eight".