1320302220 has 24 divisors (see below), whose sum is σ = 3696846384. Its totient is φ = 352080576.

The previous prime is 1320302197. The next prime is 1320302231. The reversal of 1320302220 is 222030231.

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 1320302220.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11002459 + ... + 11002578.

It is an arithmetic number, because the mean of its divisors is an integer number (154035266).

Almost surely, 2^1320302220 is an apocalyptic number.

1320302220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320302220 is an abundant number, since it is smaller than the sum of its proper divisors (2376544164).

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

1320302220 is a wasteful number, since it uses less digits than its factorization.

1320302220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22005049 (or 22005047 counting only the distinct ones).

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

The square root of 1320302220 is about 36335.9631769959. The cubic root of 1320302220 is about 1097.0450221909.

Adding to 1320302220 its reverse (222030231), we get a palindrome (1542332451).

The spelling of 1320302220 in words is "one billion, three hundred twenty million, three hundred two thousand, two hundred twenty".