1287700438 has 16 divisors (see below), whose sum is σ = 1954368000. Its totient is φ = 636270696.

The previous prime is 1287700387. The next prime is 1287700441. The reversal of 1287700438 is 8340077821.

It is a self number, because there is not a number n which added to its sum of digits gives 1287700438.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96531 + ... + 109057.

It is an arithmetic number, because the mean of its divisors is an integer number (122148000).

Almost surely, 2^1287700438 is an apocalyptic number.

1287700438 is a deficient number, since it is larger than the sum of its proper divisors (666667562).

1287700438 is a wasteful number, since it uses less digits than its factorization.

1287700438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13131.

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 1287700438 is about 35884.5431627602. The cubic root of 1287700438 is about 1087.9400079333.

The spelling of 1287700438 in words is "one billion, two hundred eighty-seven million, seven hundred thousand, four hundred thirty-eight".