1287862726860 has 72 divisors (see below), whose sum is σ = 3944444343840. Its totient is φ = 340095783168.

The previous prime is 1287862726853. The next prime is 1287862726873. The reversal of 1287862726860 is 686272687821.

1287862726860 is a `hidden beast` number, since 1 + 287 + 8 + 6 + 272 + 6 + 86 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34713465 + ... + 34750544.

It is an arithmetic number, because the mean of its divisors is an integer number (54783949220).

Almost surely, 2^{1287862726860} is an apocalyptic number.

1287862726860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1287862726860 is an abundant number, since it is smaller than the sum of its proper divisors (2656581616980).

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

1287862726860 is a wasteful number, since it uses less digits than its factorization.

1287862726860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69464127 (or 69464122 counting only the distinct ones).

The product of its (nonzero) digits is 43352064, while the sum is 63.

The spelling of 1287862726860 in words is "one trillion, two hundred eighty-seven billion, eight hundred sixty-two million, seven hundred twenty-six thousand, eight hundred sixty".