1326866688 has 432 divisors, whose sum is σ = 4719187200. Its totient is φ = 357654528.

The previous prime is 1326866669. The next prime is 1326866689. The reversal of 1326866688 is 8866686231.

It is a super-3 number, since 3×1326866688³ (a number of 28 digits) contains 333 as substring.

It is a nude number because it is divisible by every one of its digits.

Its product of digits (3981312) is a multiple of the sum of its prime divisors (108).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326866689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18176220 + ... + 18176292.

Almost surely, 2^1326866688 is an apocalyptic number.

1326866688 is a gapful number since it is divisible by the number (18) 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 1326866688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2359593600).

1326866688 is an abundant number, since it is smaller than the sum of its proper divisors (3392320512).

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

1326866688 is an equidigital number, since it uses as much as digits as its factorization.

1326866688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 108 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 54.

The square root of 1326866688 is about 36426.1813535265. The cubic root of 1326866688 is about 1098.8601658536.

The spelling of 1326866688 in words is "one billion, three hundred twenty-six million, eight hundred sixty-six thousand, six hundred eighty-eight".