1287760960 has 56 divisors (see below), whose sum is σ = 3069823680. Its totient is φ = 514543104.

The previous prime is 1287760949. The next prime is 1287760997. The reversal of 1287760960 is 690677821.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1287760960.

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 7 ways as a sum of consecutive naturals, for example, 416701 + ... + 419779.

It is an arithmetic number, because the mean of its divisors is an integer number (54818280).

Almost surely, 2^1287760960 is an apocalyptic number.

1287760960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1287760960 is an abundant number, since it is smaller than the sum of its proper divisors (1782062720).

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

1287760960 is a wasteful number, since it uses less digits than its factorization.

1287760960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4403 (or 4393 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 1287760960 is about 35885.3864407226. The cubic root of 1287760960 is about 1087.9570520821.

It can be divided in two parts, 12877 and 60960, that added together give a palindrome (73837).

The spelling of 1287760960 in words is "one billion, two hundred eighty-seven million, seven hundred sixty thousand, nine hundred sixty".