1320210840 has 128 divisors (see below), whose sum is σ = 4324098240. Its totient is φ = 320495616.

The previous prime is 1320210817. The next prime is 1320210841. The reversal of 1320210840 is 480120231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320210841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108084 + ... + 119676.

Almost surely, 2^1320210840 is an apocalyptic number.

1320210840 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 1320210840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2162049120).

1320210840 is an abundant number, since it is smaller than the sum of its proper divisors (3003887400).

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

1320210840 is a wasteful number, since it uses less digits than its factorization.

1320210840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11693 (or 11689 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1320210840 is about 36334.7057233164. The cubic root of 1320210840 is about 1097.0197122567.

It can be divided in two parts, 13202 and 10840, that added together give a palindrome (24042).

The spelling of 1320210840 in words is "one billion, three hundred twenty million, two hundred ten thousand, eight hundred forty".