1320820744 has 16 divisors (see below), whose sum is σ = 2486818620. Its totient is φ = 657669120.

The previous prime is 1320820741. The next prime is 1320820769. The reversal of 1320820744 is 4470280231.

It can be written as a sum of positive squares in 2 ways, for example, as 1102904100 + 217916644 = 33210^2 + 14762^2 .

It is not an unprimeable number, because it can be changed into a prime (1320820741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340609 + ... + 344464.

Almost surely, 2^1320820744 is an apocalyptic number.

It is an amenable number.

1320820744 is a deficient number, since it is larger than the sum of its proper divisors (1165997876).

1320820744 is a wasteful number, since it uses less digits than its factorization.

1320820744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685320 (or 685316 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 1320820744 is about 36343.0976115135. The cubic root of 1320820744 is about 1097.1886180315.

The spelling of 1320820744 in words is "one billion, three hundred twenty million, eight hundred twenty thousand, seven hundred forty-four".