1320202320 has 80 divisors (see below), whose sum is σ = 4333383360. Its totient is φ = 331343872.

The previous prime is 1320202307. The next prime is 1320202343. The reversal of 1320202320 is 232020231.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1320202320.

It is a congruent number.

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, 157710 + ... + 165869.

It is an arithmetic number, because the mean of its divisors is an integer number (54167292).

Almost surely, 2^1320202320 is an apocalyptic number.

1320202320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320202320 is an abundant number, since it is smaller than the sum of its proper divisors (3013181040).

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

1320202320 is a wasteful number, since it uses less digits than its factorization.

1320202320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323612 (or 323606 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 1320202320 is about 36334.5884798493. The cubic root of 1320202320 is about 1097.0173523740.

Adding to 1320202320 its reverse (232020231), we get a palindrome (1552222551).

The spelling of 1320202320 in words is "one billion, three hundred twenty million, two hundred two thousand, three hundred twenty".