1320503500 has 48 divisors (see below), whose sum is σ = 2888383680. Its totient is φ = 527395200.

The previous prime is 1320503479. The next prime is 1320503507. The reversal of 1320503500 is 53050231.

It is not an unprimeable number, because it can be changed into a prime (1320503507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 409896 + ... + 413104.

It is an arithmetic number, because the mean of its divisors is an integer number (60174660).

Almost surely, 2^1320503500 is an apocalyptic number.

1320503500 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 1320503500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1444191840).

1320503500 is an abundant number, since it is smaller than the sum of its proper divisors (1567880180).

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

1320503500 is a wasteful number, since it uses less digits than its factorization.

1320503500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4051 (or 4039 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 1320503500 is about 36338.7327792261. The cubic root of 1320503500 is about 1097.1007675090.

Adding to 1320503500 its reverse (53050231), we get a palindrome (1373553731).

The spelling of 1320503500 in words is "one billion, three hundred twenty million, five hundred three thousand, five hundred".