243378788400 has 360 divisors, whose sum is σ = 955502218944. Its totient is φ = 59000659200.

The previous prime is 243378788399. The next prime is 243378788437. The reversal of 243378788400 is 4887873342.

It is a tau number, because it is divible by the number of its divisors (360).

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

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 955387 + ... + 1183013.

Almost surely, 2^243378788400 is an apocalyptic number.

243378788400 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 243378788400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (477751109472).

243378788400 is an abundant number, since it is smaller than the sum of its proper divisors (712123430544).

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

243378788400 is a wasteful number, since it uses less digits than its factorization.

243378788400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227671 (or 227648 counting only the distinct ones).

The product of its (nonzero) digits is 7225344, while the sum is 54.

The spelling of 243378788400 in words is "two hundred forty-three billion, three hundred seventy-eight million, seven hundred eighty-eight thousand, four hundred".