1320345624 has 96 divisors (see below), whose sum is σ = 3588088320. Its totient is φ = 404696448.

The previous prime is 1320345623. The next prime is 1320345641. The reversal of 1320345624 is 4265430231.

It is a junction number, because it is equal to n+sod(n) for n = 1320345591 and 1320345600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320345623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1488109 + ... + 1488995.

It is an arithmetic number, because the mean of its divisors is an integer number (37375920).

Almost surely, 2^1320345624 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1320345624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1794044160).

1320345624 is an abundant number, since it is smaller than the sum of its proper divisors (2267742696).

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

1320345624 is a wasteful number, since it uses less digits than its factorization.

1320345624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289 (or 1272 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 1320345624 is about 36336.5604316094. The cubic root of 1320345624 is about 1097.0570435851.

Adding to 1320345624 its reverse (4265430231), we get a palindrome (5585775855).

The spelling of 1320345624 in words is "one billion, three hundred twenty million, three hundred forty-five thousand, six hundred twenty-four".