1240434330 has 64 divisors (see below), whose sum is σ = 3052494720. Its totient is φ = 322430976.

The previous prime is 1240434319. The next prime is 1240434331. The reversal of 1240434330 is 334340421.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1240434330.

It is not an unprimeable number, because it can be changed into a prime (1240434331) 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 31 ways as a sum of consecutive naturals, for example, 1228866 + ... + 1229874.

It is an arithmetic number, because the mean of its divisors is an integer number (47695230).

Almost surely, 2^1240434330 is an apocalyptic number.

1240434330 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 1240434330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1526247360).

1240434330 is an abundant number, since it is smaller than the sum of its proper divisors (1812060390).

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

1240434330 is a wasteful number, since it uses less digits than its factorization.

1240434330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015.

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 1240434330 is about 35219.8002549702. The cubic root of 1240434330 is about 1074.4624909757.

Adding to 1240434330 its reverse (334340421), we get a palindrome (1574774751).

The spelling of 1240434330 in words is "one billion, two hundred forty million, four hundred thirty-four thousand, three hundred thirty".