243347720 has 96 divisors (see below), whose sum is σ = 694889280. Its totient is φ = 75841920.

The previous prime is 243347693. The next prime is 243347723. The reversal of 243347720 is 27743342.

It is a super-2 number, since 2×243347720² = 118436225658396800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243347723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15917 + ... + 27203.

It is an arithmetic number, because the mean of its divisors is an integer number (7238430).

Almost surely, 2^243347720 is an apocalyptic number.

243347720 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 243347720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (347444640).

243347720 is an abundant number, since it is smaller than the sum of its proper divisors (451541560).

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

243347720 is a wasteful number, since it uses less digits than its factorization.

243347720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11323 (or 11312 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 32.

The square root of 243347720 is about 15599.6064052911. The cubic root of 243347720 is about 624.3226539222.

It can be divided in two parts, 243347 and 720, that multiplied together give a triangular number (175209840 = T₁₈₇₁₉).

The spelling of 243347720 in words is "two hundred forty-three million, three hundred forty-seven thousand, seven hundred twenty".