1326726320 has 20 divisors (see below), whose sum is σ = 3084638880. Its totient is φ = 530690496.

The previous prime is 1326726287. The next prime is 1326726329. The reversal of 1326726320 is 236276231.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (1326726329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8291960 + ... + 8292119.

It is an arithmetic number, because the mean of its divisors is an integer number (154231944).

Almost surely, 2^1326726320 is an apocalyptic number.

1326726320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1326726320 is an abundant number, since it is smaller than the sum of its proper divisors (1757912560).

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

1326726320 is a wasteful number, since it uses less digits than its factorization.

1326726320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16584092 (or 16584086 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 1326726320 is about 36424.2545565451. The cubic root of 1326726320 is about 1098.8214153535.

The spelling of 1326726320 in words is "one billion, three hundred twenty-six million, seven hundred twenty-six thousand, three hundred twenty".