243996737400 has 1344 divisors, whose sum is σ = 993883262400. Its totient is φ = 55180984320.

The previous prime is 243996737363. The next prime is 243996737447. The reversal of 243996737400 is 4737699342.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 335 ways as a sum of consecutive naturals, for example, 1264231704 + ... + 1264231896.

It is an arithmetic number, because the mean of its divisors is an integer number (739496475).

Almost surely, 2^243996737400 is an apocalyptic number.

243996737400 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 243996737400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (496941631200).

243996737400 is an abundant number, since it is smaller than the sum of its proper divisors (749886525000).

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

243996737400 is a wasteful number, since it uses less digits than its factorization.

243996737400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 6858432, while the sum is 54.

The spelling of 243996737400 in words is "two hundred forty-three billion, nine hundred ninety-six million, seven hundred thirty-seven thousand, four hundred".