12400240000 has 80 divisors (see below), whose sum is σ = 30869821620. Its totient is φ = 4960064000.

The previous prime is 12400239991. The next prime is 12400240001. The reversal of 12400240000 is 4200421.

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 (12400240001) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2499 + ... + 157501.

Almost surely, 2^12400240000 is an apocalyptic number.

12400240000 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 12400240000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15434910810).

12400240000 is an abundant number, since it is smaller than the sum of its proper divisors (18469581620).

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

12400240000 is an frugal number, since it uses more digits than its factorization.

12400240000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155037 (or 155010 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 12400240000 its reverse (4200421), we get a palindrome (12404440421).

The spelling of 12400240000 in words is "twelve billion, four hundred million, two hundred forty thousand".