1289120832 has 84 divisors (see below), whose sum is σ = 3831931376. Its totient is φ = 429701760.

The previous prime is 1289120753. The next prime is 1289120851. The reversal of 1289120832 is 2380219821.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25894 + ... + 56997.

Almost surely, 2^1289120832 is an apocalyptic number.

1289120832 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1289120832 is an abundant number, since it is smaller than the sum of its proper divisors (2542810544).

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

1289120832 is an frugal number, since it uses more digits than its factorization.

1289120832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82918 (or 82896 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 1289120832 is about 35904.3288754991. The cubic root of 1289120832 is about 1088.3398772355.

The spelling of 1289120832 in words is "one billion, two hundred eighty-nine million, one hundred twenty thousand, eight hundred thirty-two".