243189436 has 48 divisors (see below), whose sum is σ = 513990400. Its totient is φ = 98350848.

The previous prime is 243189433. The next prime is 243189449. The reversal of 243189436 is 634981342.

It is a happy number.

It is a super-2 number, since 2×243189436² = 118282203563996192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243189433) 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, 162580 + ... + 164068.

Almost surely, 2^243189436 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 243189436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256995200).

243189436 is an abundant number, since it is smaller than the sum of its proper divisors (270800964).

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

243189436 is a wasteful number, since it uses less digits than its factorization.

243189436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1826 (or 1824 counting only the distinct ones).

The product of its digits is 124416, while the sum is 40.

The square root of 243189436 is about 15594.5322469127. The cubic root of 243189436 is about 624.1872623100.

The spelling of 243189436 in words is "two hundred forty-three million, one hundred eighty-nine thousand, four hundred thirty-six".