243936644 has 24 divisors (see below), whose sum is σ = 503612928. Its totient is φ = 101171520.

The previous prime is 243936631. The next prime is 243936653. The reversal of 243936644 is 446639342.

It is a super-3 number, since 3×243936644³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139649 + ... + 141384.

It is an arithmetic number, because the mean of its divisors is an integer number (20983872).

Almost surely, 2^243936644 is an apocalyptic number.

It is an amenable number.

243936644 is an abundant number, since it is smaller than the sum of its proper divisors (259676284).

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

243936644 is a wasteful number, since it uses less digits than its factorization.

243936644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281075 (or 281073 counting only the distinct ones).

The product of its digits is 373248, while the sum is 41.

The square root of 243936644 is about 15618.4712440110. The cubic root of 243936644 is about 624.8258877137.

The spelling of 243936644 in words is "two hundred forty-three million, nine hundred thirty-six thousand, six hundred forty-four".