243447120 has 240 divisors, whose sum is σ = 969521280. Its totient is φ = 55613952.

The previous prime is 243447119. The next prime is 243447131. The reversal of 243447120 is 21744342.

It is a tau number, because it is divible by the number of its divisors (240).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 135186 + ... + 136974.

It is an arithmetic number, because the mean of its divisors is an integer number (4039672).

Almost surely, 2^243447120 is an apocalyptic number.

243447120 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 243447120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (484760640).

243447120 is an abundant number, since it is smaller than the sum of its proper divisors (726074160).

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

243447120 is a wasteful number, since it uses less digits than its factorization.

243447120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824 (or 1806 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 243447120 is about 15602.7920578338. The cubic root of 243447120 is about 624.4076478343.

The spelling of 243447120 in words is "two hundred forty-three million, four hundred forty-seven thousand, one hundred twenty".