1345443320 has 64 divisors (see below), whose sum is σ = 3265647840. Its totient is φ = 495936000.

The previous prime is 1345443311. The next prime is 1345443347. The reversal of 1345443320 is 233445431.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 362675 + ... + 366365.

Almost surely, 2^1345443320 is an apocalyptic number.

1345443320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1345443320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1632823920).

1345443320 is an abundant number, since it is smaller than the sum of its proper divisors (1920204520).

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

1345443320 is a wasteful number, since it uses less digits than its factorization.

1345443320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4416 (or 4412 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 29.

The square root of 1345443320 is about 36680.2851679209. The cubic root of 1345443320 is about 1103.9645699440.

Adding to 1345443320 its reverse (233445431), we get a palindrome (1578888751).

The spelling of 1345443320 in words is "one billion, three hundred forty-five million, four hundred forty-three thousand, three hundred twenty".