1287663608 has 96 divisors (see below), whose sum is σ = 3047721600. Its totient is φ = 499245120.

The previous prime is 1287663593. The next prime is 1287663617. The reversal of 1287663608 is 8063667821.

It is a congruent number.

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, 2079923 + ... + 2080541.

It is an arithmetic number, because the mean of its divisors is an integer number (31747100).

Almost surely, 2^1287663608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1287663608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1523860800).

1287663608 is an abundant number, since it is smaller than the sum of its proper divisors (1760057992).

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

1287663608 is a wasteful number, since it uses less digits than its factorization.

1287663608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961 (or 946 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 47.

The square root of 1287663608 is about 35884.0299854963. The cubic root of 1287663608 is about 1087.9296356419.

The spelling of 1287663608 in words is "one billion, two hundred eighty-seven million, six hundred sixty-three thousand, six hundred eight".