1001243688 has 64 divisors (see below), whose sum is σ = 2564352000. Its totient is φ = 325666752.

The previous prime is 1001243669. The next prime is 1001243689. The reversal of 1001243688 is 8863421001.

1001243688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1001243689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194281 + ... + 199367.

It is an arithmetic number, because the mean of its divisors is an integer number (40068000).

Almost surely, 2^1001243688 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 1001243688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1282176000).

1001243688 is an abundant number, since it is smaller than the sum of its proper divisors (1563108312).

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

1001243688 is a wasteful number, since it uses less digits than its factorization.

1001243688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5294 (or 5290 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 1001243688 is about 31642.4349252708. The cubic root of 1001243688 is about 1000.4143909231.

Adding to 1001243688 its reverse (8863421001), we get a palindrome (9864664689).

The spelling of 1001243688 in words is "one billion, one million, two hundred forty-three thousand, six hundred eighty-eight".