1320555330 has 48 divisors (see below), whose sum is σ = 3458537784. Its totient is φ = 349574400.

The previous prime is 1320555317. The next prime is 1320555337. The reversal of 1320555330 is 335550231.

1320555330 is a `hidden beast` number, since 1 + 320 + 5 + 5 + 5 + 330 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 741527361 + 579027969 = 27231^2 + 24063^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1320555294 and 1320555303.

It is not an unprimeable number, because it can be changed into a prime (1320555337) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41221 + ... + 65880.

Almost surely, 2^1320555330 is an apocalyptic number.

1320555330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1320555330 is an abundant number, since it is smaller than the sum of its proper divisors (2137982454).

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

1320555330 is a wasteful number, since it uses less digits than its factorization.

1320555330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107251 (or 107248 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 27.

The square root of 1320555330 is about 36339.4459231288. The cubic root of 1320555330 is about 1097.1151211221.

The spelling of 1320555330 in words is "one billion, three hundred twenty million, five hundred fifty-five thousand, three hundred thirty".