1288643216 has 40 divisors (see below), whose sum is σ = 2945478144. Its totient is φ = 534458880.

The previous prime is 1288643183. The next prime is 1288643233. The reversal of 1288643216 is 6123468821.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182105 + ... + 189048.

Almost surely, 2^1288643216 is an apocalyptic number.

1288643216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1288643216 is an abundant number, since it is smaller than the sum of its proper divisors (1656834928).

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

1288643216 is a wasteful number, since it uses less digits than its factorization.

1288643216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371199 (or 371193 counting only the distinct ones).

The product of its digits is 110592, while the sum is 41.

The square root of 1288643216 is about 35897.6770279081. The cubic root of 1288643216 is about 1088.2054515776.

The spelling of 1288643216 in words is "one billion, two hundred eighty-eight million, six hundred forty-three thousand, two hundred sixteen".