1326803040 has 144 divisors (see below), whose sum is σ = 4539710448. Its totient is φ = 352877568.

The previous prime is 1326803021. The next prime is 1326803081. The reversal of 1326803040 is 403086231.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is a junction number, because it is equal to n+sod(n) for n = 1326802995 and 1326803013.

It is a congruent number.

It is an unprimeable number.

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, 671494 + ... + 673466.

It is an arithmetic number, because the mean of its divisors is an integer number (31525767).

Almost surely, 2^1326803040 is an apocalyptic number.

1326803040 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 1326803040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2269855224).

1326803040 is an abundant number, since it is smaller than the sum of its proper divisors (3212907408).

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

1326803040 is a wasteful number, since it uses less digits than its factorization.

1326803040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2461 (or 2450 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1326803040 is about 36425.3076857286. The cubic root of 1326803040 is about 1098.8425952942.

Adding to 1326803040 its reverse (403086231), we get a palindrome (1729889271).

The spelling of 1326803040 in words is "one billion, three hundred twenty-six million, eight hundred three thousand, forty".