243557632 has 36 divisors (see below), whose sum is σ = 492358720. Its totient is φ = 120227328.

The previous prime is 243557627. The next prime is 243557647. The reversal of 243557632 is 236755342.

It is a junction number, because it is equal to n+sod(n) for n = 243557591 and 243557600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14203 + ... + 26245.

Almost surely, 2^243557632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243557632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246179360).

243557632 is an abundant number, since it is smaller than the sum of its proper divisors (248801088).

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

243557632 is an equidigital number, since it uses as much as digits as its factorization.

243557632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12138 (or 12124 counting only the distinct ones).

The product of its digits is 151200, while the sum is 37.

The square root of 243557632 is about 15606.3330734673. Note that the first 3 decimals coincide. The cubic root of 243557632 is about 624.5021161240.

The spelling of 243557632 in words is "two hundred forty-three million, five hundred fifty-seven thousand, six hundred thirty-two".