12420002400 has 144 divisors (see below), whose sum is σ = 43536994704. Its totient is φ = 3057223680.

The previous prime is 12420002383. The next prime is 12420002407. The reversal of 12420002400 is 420002421.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12420002400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12420002407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 167839 + ... + 230238.

It is an arithmetic number, because the mean of its divisors is an integer number (302340241).

Almost surely, 2^12420002400 is an apocalyptic number.

12420002400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12420002400 is an abundant number, since it is smaller than the sum of its proper divisors (31116992304).

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

12420002400 is a wasteful number, since it uses less digits than its factorization.

12420002400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398113 (or 398100 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 12420002400 its reverse (420002421), we get a palindrome (12840004821).

The spelling of 12420002400 in words is "twelve billion, four hundred twenty million, two thousand, four hundred".