1287862726839 has 48 divisors (see below), whose sum is σ = 1992891035520. Its totient is φ = 733357074240.

The previous prime is 1287862726837. The next prime is 1287862726853. The reversal of 1287862726839 is 9386272687821.

It is not a de Polignac number, because 1287862726839 - 2¹ = 1287862726837 is a prime.

It is a Smith number, since the sum of its digits (69) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287862726831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 900124 + ... + 1840094.

It is an arithmetic number, because the mean of its divisors is an integer number (41518563240).

Almost surely, 2^{1287862726839} is an apocalyptic number.

1287862726839 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1287862726839 is a deficient number, since it is larger than the sum of its proper divisors (705028308681).

1287862726839 is a wasteful number, since it uses less digits than its factorization.

1287862726839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940092 (or 940049 counting only the distinct ones).

The product of its digits is 195084288, while the sum is 69.

The spelling of 1287862726839 in words is "one trillion, two hundred eighty-seven billion, eight hundred sixty-two million, seven hundred twenty-six thousand, eight hundred thirty-nine".