1320755770 has 24 divisors (see below), whose sum is σ = 2386279476. Its totient is φ = 526326528.

The previous prime is 1320755767. The next prime is 1320755803. The reversal of 1320755770 is 775570231.

It can be written as a sum of positive squares in 2 ways, for example, as 1287589689 + 33166081 = 35883^2 + 5759^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1962154 + ... + 1962826.

Almost surely, 2^1320755770 is an apocalyptic number.

1320755770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1320755770 is a deficient number, since it is larger than the sum of its proper divisors (1065523706).

1320755770 is an frugal number, since it uses more digits than its factorization.

1320755770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566 (or 1123 counting only the distinct ones).

The product of its (nonzero) digits is 51450, while the sum is 37.

The square root of 1320755770 is about 36342.2037031328. The cubic root of 1320755770 is about 1097.1706267175.

The spelling of 1320755770 in words is "one billion, three hundred twenty million, seven hundred fifty-five thousand, seven hundred seventy".