243622720 has 112 divisors (see below), whose sum is σ = 642932928. Its totient is φ = 87183360.

The previous prime is 243622651. The next prime is 243622721. The reversal of 243622720 is 27226342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243622721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235324 + ... + 236356.

Almost surely, 2^243622720 is an apocalyptic number.

243622720 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 243622720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321466464).

243622720 is an abundant number, since it is smaller than the sum of its proper divisors (399310208).

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

243622720 is a wasteful number, since it uses less digits than its factorization.

243622720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128 (or 1118 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 243622720 is about 15608.4182414491. The cubic root of 243622720 is about 624.5577415257.

The spelling of 243622720 in words is "two hundred forty-three million, six hundred twenty-two thousand, seven hundred twenty".