243400401244 has 192 divisors, whose sum is σ = 579608515584. Its totient is φ = 87085152000.

The previous prime is 243400401217. The next prime is 243400401247. The reversal of 243400401244 is 442104004342.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243400401247) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 102224934 + ... + 102227314.

It is an arithmetic number, because the mean of its divisors is an integer number (3018794352).

Almost surely, 2^243400401244 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243400401244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289804257792).

243400401244 is an abundant number, since it is smaller than the sum of its proper divisors (336208114340).

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

243400401244 is a wasteful number, since it uses less digits than its factorization.

243400401244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2649 (or 2625 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 243400401244 its reverse (442104004342), we get a palindrome (685504405586).

The spelling of 243400401244 in words is "two hundred forty-three billion, four hundred million, four hundred one thousand, two hundred forty-four".