12303302440 has 128 divisors (see below), whose sum is σ = 32646136320. Its totient is φ = 4114022400.

The previous prime is 12303302437. The next prime is 12303302443. The reversal of 12303302440 is 4420330321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12303302437) and next prime (12303302443).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (12303302443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1546152 + ... + 1554088.

It is an arithmetic number, because the mean of its divisors is an integer number (255047940).

Almost surely, 2^12303302440 is an apocalyptic number.

12303302440 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 12303302440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16323068160).

12303302440 is an abundant number, since it is smaller than the sum of its proper divisors (20342833880).

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

12303302440 is a wasteful number, since it uses less digits than its factorization.

12303302440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8243 (or 8239 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 12303302440 its reverse (4420330321), we get a palindrome (16723632761).

The spelling of 12303302440 in words is "twelve billion, three hundred three million, three hundred two thousand, four hundred forty".