243798208240 has 40 divisors (see below), whose sum is σ = 578891073600. Its totient is φ = 95444403456.

The previous prime is 243798208223. The next prime is 243798208249. The reversal of 243798208240 is 42802897342.

243798208240 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243798208249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32416215 + ... + 32423734.

It is an arithmetic number, because the mean of its divisors is an integer number (14472276840).

Almost surely, 2^243798208240 is an apocalyptic number.

243798208240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243798208240 is an abundant number, since it is smaller than the sum of its proper divisors (335092865360).

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

243798208240 is a wasteful number, since it uses less digits than its factorization.

243798208240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64840009 (or 64840003 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 49.

The spelling of 243798208240 in words is "two hundred forty-three billion, seven hundred ninety-eight million, two hundred eight thousand, two hundred forty".