1001043320 has 64 divisors (see below), whose sum is σ = 2348317440. Its totient is φ = 383616000.

The previous prime is 1001043319. The next prime is 1001043343. The reversal of 1001043320 is 233401001.

It is a junction number, because it is equal to n+sod(n) for n = 1001043295 and 1001043304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121244 + ... + 129236.

It is an arithmetic number, because the mean of its divisors is an integer number (36692460).

Almost surely, 2^1001043320 is an apocalyptic number.

1001043320 is a gapful number since it is divisible by the number (10) 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 1001043320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1174158720).

1001043320 is an abundant number, since it is smaller than the sum of its proper divisors (1347274120).

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

1001043320 is a wasteful number, since it uses less digits than its factorization.

1001043320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8136 (or 8132 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1001043320 is about 31639.2686388292. The cubic root of 1001043320 is about 1000.3476524571.

Adding to 1001043320 its reverse (233401001), we get a palindrome (1234444321).

The spelling of 1001043320 in words is "one billion, one million, forty-three thousand, three hundred twenty".