243397984 has 24 divisors (see below), whose sum is σ = 479697120. Its totient is φ = 121570176.

The previous prime is 243397949. The next prime is 243397997. The reversal of 243397984 is 489793342.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31497 + ... + 38455.

It is an arithmetic number, because the mean of its divisors is an integer number (19987380).

Almost surely, 2^243397984 is an apocalyptic number.

It is an amenable number.

243397984 is a deficient number, since it is larger than the sum of its proper divisors (236299136).

243397984 is a wasteful number, since it uses less digits than its factorization.

243397984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8062 (or 8054 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 49.

The square root of 243397984 is about 15601.2173883963. The cubic root of 243397984 is about 624.3656360296.

It can be divided in two parts, 24339 and 7984, that added together give a palindrome (32323).

The spelling of 243397984 in words is "two hundred forty-three million, three hundred ninety-seven thousand, nine hundred eighty-four".