1287357168 has 20 divisors (see below), whose sum is σ = 3325672808. Its totient is φ = 429119040.

The previous prime is 1287357151. The next prime is 1287357199. The reversal of 1287357168 is 8617537821.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 26819941 = 1287357168 / (1 + 2 + 8 + 7 + 3 + 5 + 7 + 1 + 6 + 8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13409923 + ... + 13410018.

Almost surely, 2^1287357168 is an apocalyptic number.

It is an amenable number.

1287357168 is an abundant number, since it is smaller than the sum of its proper divisors (2038315640).

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

1287357168 is a wasteful number, since it uses less digits than its factorization.

1287357168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26819952 (or 26819946 counting only the distinct ones).

The product of its digits is 564480, while the sum is 48.

The square root of 1287357168 is about 35879.7598654172. The cubic root of 1287357168 is about 1087.8433264523.

The spelling of 1287357168 in words is "one billion, two hundred eighty-seven million, three hundred fifty-seven thousand, one hundred sixty-eight".