1288065996 has 384 divisors, whose sum is σ = 4319723520. Its totient is φ = 323481600.

The previous prime is 1288065953. The next prime is 1288066061. The reversal of 1288065996 is 6995608821.

It is a happy number.

It is a super-2 number, since 2×1288065996² = 3318228020102944032, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 21115806 + ... + 21115866.

It is an arithmetic number, because the mean of its divisors is an integer number (11249280).

Almost surely, 2^1288065996 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 1288065996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2159861760).

1288065996 is an abundant number, since it is smaller than the sum of its proper divisors (3031657524).

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

1288065996 is a wasteful number, since it uses less digits than its factorization.

1288065996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The square root of 1288065996 is about 35889.6363313980. The cubic root of 1288065996 is about 1088.0429479064.

The spelling of 1288065996 in words is "one billion, two hundred eighty-eight million, sixty-five thousand, nine hundred ninety-six".