1288866860 has 12 divisors (see below), whose sum is σ = 2706620448. Its totient is φ = 515546736.

The previous prime is 1288866841. The next prime is 1288866871. The reversal of 1288866860 is 686688821.

It is a super-2 number, since 2×1288866860² = 3322355565612519200, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 32221652 + ... + 32221691.

It is an arithmetic number, because the mean of its divisors is an integer number (225551704).

Almost surely, 2^1288866860 is an apocalyptic number.

1288866860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1288866860 is an abundant number, since it is smaller than the sum of its proper divisors (1417753588).

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

1288866860 is a wasteful number, since it uses less digits than its factorization.

1288866860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64443352 (or 64443350 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 53.

The square root of 1288866860 is about 35900.7919132712. The cubic root of 1288866860 is about 1088.2684006130.

The spelling of 1288866860 in words is "one billion, two hundred eighty-eight million, eight hundred sixty-six thousand, eight hundred sixty".