1326406320 has 160 divisors (see below), whose sum is σ = 4767552000. Its totient is φ = 338317056.

The previous prime is 1326406307. The next prime is 1326406327. The reversal of 1326406320 is 236046231.

1326406320 is a `hidden beast` number, since 1 + 3 + 26 + 4 + 0 + 632 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1326406327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36331 + ... + 63029.

It is an arithmetic number, because the mean of its divisors is an integer number (29797200).

Almost surely, 2^1326406320 is an apocalyptic number.

1326406320 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 1326406320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2383776000).

1326406320 is an abundant number, since it is smaller than the sum of its proper divisors (3441145680).

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

1326406320 is a wasteful number, since it uses less digits than its factorization.

1326406320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26744 (or 26732 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 1326406320 is about 36419.8616142346. The cubic root of 1326406320 is about 1098.7330647718.

The spelling of 1326406320 in words is "one billion, three hundred twenty-six million, four hundred six thousand, three hundred twenty".