1305603040 has 144 divisors (see below), whose sum is σ = 3608179344. Its totient is φ = 445132800.

The previous prime is 1305603011. The next prime is 1305603049. The reversal of 1305603040 is 403065031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305603049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1889095 + ... + 1889785.

It is an arithmetic number, because the mean of its divisors is an integer number (25056801).

Almost surely, 2^1305603040 is an apocalyptic number.

1305603040 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 1305603040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1804089672).

1305603040 is an abundant number, since it is smaller than the sum of its proper divisors (2302576304).

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

1305603040 is a wasteful number, since it uses less digits than its factorization.

1305603040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961 (or 946 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 1305603040 is about 36133.1293967185. The cubic root of 1305603040 is about 1092.9586147295.

Adding to 1305603040 its reverse (403065031), we get a palindrome (1708668071).

The spelling of 1305603040 in words is "one billion, three hundred five million, six hundred three thousand, forty".