243978384 has 40 divisors (see below), whose sum is σ = 678762112. Its totient is φ = 75070080.

The previous prime is 243978359. The next prime is 243978389. The reversal of 243978384 is 483879342.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (243978389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194872 + ... + 196119.

Almost surely, 2^243978384 is an apocalyptic number.

243978384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

243978384 is an abundant number, since it is smaller than the sum of its proper divisors (434783728).

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

243978384 is a wasteful number, since it uses less digits than its factorization.

243978384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391015 (or 391009 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 48.

The square root of 243978384 is about 15619.8074251893. The cubic root of 243978384 is about 624.8615236678.

The spelling of 243978384 in words is "two hundred forty-three million, nine hundred seventy-eight thousand, three hundred eighty-four".