1303040240 has 80 divisors (see below), whose sum is σ = 3080802816. Its totient is φ = 512467200.

The previous prime is 1303040237. The next prime is 1303040243. The reversal of 1303040240 is 420403031.

It is an interprime number because it is at equal distance from previous prime (1303040237) and next prime (1303040243).

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1303040243) 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, 2064725 + ... + 2065355.

Almost surely, 2^1303040240 is an apocalyptic number.

1303040240 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 1303040240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1540401408).

1303040240 is an abundant number, since it is smaller than the sum of its proper divisors (1777762576).

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

1303040240 is a wasteful number, since it uses less digits than its factorization.

1303040240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038 (or 1032 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 1303040240 is about 36097.6486768875. The cubic root of 1303040240 is about 1092.2430146089.

Adding to 1303040240 its reverse (420403031), we get a palindrome (1723443271).

The spelling of 1303040240 in words is "one billion, three hundred three million, forty thousand, two hundred forty".