243638352 has 30 divisors (see below), whose sum is σ = 681849402. Its totient is φ = 81212736.

The previous prime is 243638327. The next prime is 243638383. The reversal of 243638352 is 253836342.

It is a happy number.

243638352 is a `hidden beast` number, since 243 + 63 + 8 + 352 = 666.

It can be written as a sum of positive squares in only one way, i.e., 138862656 + 104775696 = 11784^2 + 10236^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 845823 + ... + 846110.

Almost surely, 2^243638352 is an apocalyptic number.

It is an amenable number.

243638352 is an abundant number, since it is smaller than the sum of its proper divisors (438211050).

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

243638352 is a wasteful number, since it uses less digits than its factorization.

243638352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1691947 (or 1691938 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 243638352 is about 15608.9189888346. The cubic root of 243638352 is about 624.5710994449.

The spelling of 243638352 in words is "two hundred forty-three million, six hundred thirty-eight thousand, three hundred fifty-two".