243550636 has 48 divisors (see below), whose sum is σ = 521640000. Its totient is φ = 97118208.

The previous prime is 243550603. The next prime is 243550639. The reversal of 243550636 is 636055342.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (243550639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39490 + ... + 45238.

It is an arithmetic number, because the mean of its divisors is an integer number (10867500).

Almost surely, 2^243550636 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 243550636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260820000).

243550636 is an abundant number, since it is smaller than the sum of its proper divisors (278089364).

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

243550636 is a wasteful number, since it uses less digits than its factorization.

243550636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5866 (or 5864 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 34.

The square root of 243550636 is about 15606.1089320817. The cubic root of 243550636 is about 624.4961366239.

The spelling of 243550636 in words is "two hundred forty-three million, five hundred fifty thousand, six hundred thirty-six".