1288803912 has 96 divisors (see below), whose sum is σ = 3624260640. Its totient is φ = 381427200.

The previous prime is 1288803911. The next prime is 1288803917. The reversal of 1288803912 is 2193088821.

It is a super-2 number, since 2×1288803912² = 3322031047173007488, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1288803911) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 119712 + ... + 130032.

It is an arithmetic number, because the mean of its divisors is an integer number (37752715).

Almost surely, 2^1288803912 is an apocalyptic number.

1288803912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1288803912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1812130320).

1288803912 is an abundant number, since it is smaller than the sum of its proper divisors (2335456728).

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

1288803912 is a wasteful number, since it uses less digits than its factorization.

1288803912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10395 (or 10380 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 1288803912 is about 35899.9152088135. The cubic root of 1288803912 is about 1088.2506833875.

The spelling of 1288803912 in words is "one billion, two hundred eighty-eight million, eight hundred three thousand, nine hundred twelve".