1326138480 has 140 divisors (see below), whose sum is σ = 4622996520. Its totient is φ = 353621376.

The previous prime is 1326138389. The next prime is 1326138487. The reversal of 1326138480 is 848316231.

1326138480 is a `hidden beast` number, since 1 + 32 + 613 + 8 + 4 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326138487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 46951 + ... + 69689.

Almost surely, 2^1326138480 is an apocalyptic number.

1326138480 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 1326138480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2311498260).

1326138480 is an abundant number, since it is smaller than the sum of its proper divisors (3296858040).

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

1326138480 is an equidigital number, since it uses as much as digits as its factorization.

1326138480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22770 (or 22749 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 1326138480 is about 36416.1843141206. The cubic root of 1326138480 is about 1098.6591044098.

The spelling of 1326138480 in words is "one billion, three hundred twenty-six million, one hundred thirty-eight thousand, four hundred eighty".