2431304240 has 80 divisors (see below), whose sum is σ = 5911550208. Its totient is φ = 928190208.

The previous prime is 2431304203. The next prime is 2431304243. The reversal of 2431304240 is 424031342.

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

It is a super-2 number, since 2×2431304240² = 11822480614883955200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (2431304243) 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, 1034747 + ... + 1037093.

Almost surely, 2^2431304240 is an apocalyptic number.

2431304240 is a gapful number since it is divisible by the number (20) 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 2431304240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2955775104).

2431304240 is an abundant number, since it is smaller than the sum of its proper divisors (3480245968).

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

2431304240 is a wasteful number, since it uses less digits than its factorization.

2431304240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2946 (or 2940 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 2431304240 is about 49308.2573206557. The cubic root of 2431304240 is about 1344.6619088211.

Adding to 2431304240 its reverse (424031342), we get a palindrome (2855335582).

The spelling of 2431304240 in words is "two billion, four hundred thirty-one million, three hundred four thousand, two hundred forty".