243273240 has 192 divisors, whose sum is σ = 943509600. Its totient is φ = 55593216.

The previous prime is 243273197. The next prime is 243273241. The reversal of 243273240 is 42372342.

243273240 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243273241) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 50622 + ... + 55218.

Almost surely, 2^243273240 is an apocalyptic number.

243273240 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 243273240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (471754800).

243273240 is an abundant number, since it is smaller than the sum of its proper divisors (700236360).

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

243273240 is a wasteful number, since it uses less digits than its factorization.

243273240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4631 (or 4614 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 27.

The square root of 243273240 is about 15597.2189828828. The cubic root of 243273240 is about 624.2589531733.

The spelling of 243273240 in words is "two hundred forty-three million, two hundred seventy-three thousand, two hundred forty".