1068721892 has 48 divisors (see below), whose sum is σ = 2198085120. Its totient is φ = 445191552.

The previous prime is 1068721889. The next prime is 1068721909. The reversal of 1068721892 is 2981278601.

It is a super-2 number, since 2×1068721892² = 2284332964880119328, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158453 + ... + 165059.

It is an arithmetic number, because the mean of its divisors is an integer number (45793440).

Almost surely, 2^1068721892 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 1068721892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1099042560).

1068721892 is an abundant number, since it is smaller than the sum of its proper divisors (1129363228).

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

1068721892 is a wasteful number, since it uses less digits than its factorization.

1068721892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6780 (or 6778 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 1068721892 is about 32691.3121792320. The cubic root of 1068721892 is about 1022.4017132428.

The spelling of 1068721892 in words is "one billion, sixty-eight million, seven hundred twenty-one thousand, eight hundred ninety-two".