1288640064 has 28 divisors (see below), whose sum is σ = 3409527344. Its totient is φ = 429546624.

The previous prime is 1288640051. The next prime is 1288640099. The reversal of 1288640064 is 4600468821.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 3355642 + ... + 3356025.

Almost surely, 2^1288640064 is an apocalyptic number.

It is an amenable number.

1288640064 is an abundant number, since it is smaller than the sum of its proper divisors (2120887280).

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

1288640064 is an equidigital number, since it uses as much as digits as its factorization.

1288640064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6711682 (or 6711672 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 1288640064 is about 35897.6331253190. The cubic root of 1288640064 is about 1088.2045643327.

The spelling of 1288640064 in words is "one billion, two hundred eighty-eight million, six hundred forty thousand, sixty-four".