1289046960 has 420 divisors, whose sum is σ = 4844997936. Its totient is φ = 318193920.

The previous prime is 1289046931. The next prime is 1289047003. The reversal of 1289046960 is 696409821.

It is a happy number.

1289046960 is a `hidden beast` number, since 128 + 9 + 0 + 469 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 41582145 + ... + 41582175.

Almost surely, 2^1289046960 is an apocalyptic number.

1289046960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1289046960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2422498968).

1289046960 is an abundant number, since it is smaller than the sum of its proper divisors (3555950976).

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

1289046960 is an equidigital number, since it uses as much as digits as its factorization.

1289046960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 1289046960 is about 35903.3001268686. The cubic root of 1289046960 is about 1088.3190880337.

The spelling of 1289046960 in words is "one billion, two hundred eighty-nine million, forty-six thousand, nine hundred sixty".