1326894720 has 128 divisors (see below), whose sum is σ = 4287867840. Its totient is φ = 348954624.

The previous prime is 1326894707. The next prime is 1326894769. The reversal of 1326894720 is 274986231.

It is a tau number, because it is divible by the number of its divisors (128).

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, 135427 + ... + 144893.

Almost surely, 2^1326894720 is an apocalyptic number.

1326894720 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 1326894720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2143933920).

1326894720 is an abundant number, since it is smaller than the sum of its proper divisors (2960973120).

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

1326894720 is an equidigital number, since it uses as much as digits as its factorization.

1326894720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9562 (or 9550 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 1326894720 is about 36426.5661296807. The cubic root of 1326894720 is about 1098.8679041420.

The spelling of 1326894720 in words is "one billion, three hundred twenty-six million, eight hundred ninety-four thousand, seven hundred twenty".