1320609764 has 12 divisors (see below), whose sum is σ = 2311367100. Its totient is φ = 660219168.

The previous prime is 1320609761. The next prime is 1320609769. The reversal of 1320609764 is 4679060231.

It can be written as a sum of positive squares in 2 ways, for example, as 486555364 + 834054400 = 22058^2 + 28880^2 .

It is not an unprimeable number, because it can be changed into a prime (1320609761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23882 + ... + 56670.

It is an arithmetic number, because the mean of its divisors is an integer number (192613925).

Almost surely, 2^1320609764 is an apocalyptic number.

It is an amenable number.

1320609764 is a deficient number, since it is larger than the sum of its proper divisors (990757336).

1320609764 is a wasteful number, since it uses less digits than its factorization.

1320609764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42862 (or 42860 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 1320609764 is about 36340.1948811505. The cubic root of 1320609764 is about 1097.1301954732.

Adding to 1320609764 its reverse (4679060231), we get a palindrome (5999669995).

The spelling of 1320609764 in words is "one billion, three hundred twenty million, six hundred nine thousand, seven hundred sixty-four".