243856648 has 32 divisors (see below), whose sum is σ = 525591360. Its totient is φ = 103901760.

The previous prime is 243856609. The next prime is 243856651. The reversal of 243856648 is 846658342.

It is a junction number, because it is equal to n+sod(n) for n = 243856598 and 243856607.

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, 2898 + ... + 22273.

It is an arithmetic number, because the mean of its divisors is an integer number (16424730).

Almost surely, 2^243856648 is an apocalyptic number.

243856648 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

243856648 is an abundant number, since it is smaller than the sum of its proper divisors (281734712).

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

243856648 is a wasteful number, since it uses less digits than its factorization.

243856648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25357 (or 25353 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 46.

The square root of 243856648 is about 15615.9100919543. The cubic root of 243856648 is about 624.7575789434.

The spelling of 243856648 in words is "two hundred forty-three million, eight hundred fifty-six thousand, six hundred forty-eight".