1326113520 has 40 divisors (see below), whose sum is σ = 4110952656. Its totient is φ = 353630208.

The previous prime is 1326113519. The next prime is 1326113527. The reversal of 1326113520 is 253116231.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326113527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2762497 + ... + 2762976.

Almost surely, 2^1326113520 is an apocalyptic number.

1326113520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1326113520 is an abundant number, since it is smaller than the sum of its proper divisors (2784839136).

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

1326113520 is a wasteful number, since it uses less digits than its factorization.

1326113520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5525489 (or 5525483 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 1326113520 is about 36415.8416077399. The cubic root of 1326113520 is about 1098.6522115391.

Adding to 1326113520 its reverse (253116231), we get a palindrome (1579229751).

The spelling of 1326113520 in words is "one billion, three hundred twenty-six million, one hundred thirteen thousand, five hundred twenty".