1320340140 has 144 divisors (see below), whose sum is σ = 4641960960. Its totient is φ = 297521280.

The previous prime is 1320340129. The next prime is 1320340141. The reversal of 1320340140 is 410430231.

1320340140 is a `hidden beast` number, since 1 + 320 + 340 + 1 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1320340141) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 82081 + ... + 96839.

It is an arithmetic number, because the mean of its divisors is an integer number (32235840).

Almost surely, 2^1320340140 is an apocalyptic number.

1320340140 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 1320340140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2320980480).

1320340140 is an abundant number, since it is smaller than the sum of its proper divisors (3321620820).

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

1320340140 is a wasteful number, since it uses less digits than its factorization.

1320340140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14852 (or 14847 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1320340140 is about 36336.4849703435. The cubic root of 1320340140 is about 1097.0555247229.

Adding to 1320340140 its reverse (410430231), we get a palindrome (1730770371).

Subtracting from 1320340140 its reverse (410430231), we obtain a palindrome (909909909).

The spelling of 1320340140 in words is "one billion, three hundred twenty million, three hundred forty thousand, one hundred forty".