1320540450 has 96 divisors (see below), whose sum is σ = 3500133120. Its totient is φ = 328320000.

The previous prime is 1320540409. The next prime is 1320540457. The reversal of 1320540450 is 540450231.

It is a self number, because there is not a number n which added to its sum of digits gives 1320540450.

It is not an unprimeable number, because it can be changed into a prime (1320540457) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 275575 + ... + 280325.

It is an arithmetic number, because the mean of its divisors is an integer number (36459720).

Almost surely, 2^1320540450 is an apocalyptic number.

1320540450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1320540450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1750066560).

1320540450 is an abundant number, since it is smaller than the sum of its proper divisors (2179592670).

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

1320540450 is a wasteful number, since it uses less digits than its factorization.

1320540450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4892 (or 4887 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 1320540450 is about 36339.2411863539. The cubic root of 1320540450 is about 1097.1110003471. Note that the first 3 decimals are identical.

Adding to 1320540450 its reverse (540450231), we get a palindrome (1860990681).

The spelling of 1320540450 in words is "one billion, three hundred twenty million, five hundred forty thousand, four hundred fifty".