1287876028 has 12 divisors (see below), whose sum is σ = 2326485952. Its totient is φ = 623165760.

The previous prime is 1287876019. The next prime is 1287876049. The reversal of 1287876028 is 8206787821.

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 3 ways as a sum of consecutive naturals, for example, 5192925 + ... + 5193172.

Almost surely, 2^1287876028 is an apocalyptic number.

It is an amenable number.

1287876028 is a deficient number, since it is larger than the sum of its proper divisors (1038609924).

1287876028 is a wasteful number, since it uses less digits than its factorization.

1287876028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10386132 (or 10386130 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 49.

The square root of 1287876028 is about 35886.9896759257. The cubic root of 1287876028 is about 1087.9894559514.

The spelling of 1287876028 in words is "one billion, two hundred eighty-seven million, eight hundred seventy-six thousand, twenty-eight".