243449984 has 32 divisors (see below), whose sum is σ = 485797440. Its totient is φ = 121524480.

The previous prime is 243449981. The next prime is 243449993. The reversal of 243449984 is 489944342.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (243449981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104189 + ... + 106499.

It is an arithmetic number, because the mean of its divisors is an integer number (15181170).

Almost surely, 2^243449984 is an apocalyptic number.

It is an amenable number.

243449984 is a deficient number, since it is larger than the sum of its proper divisors (242347456).

243449984 is an equidigital number, since it uses as much as digits as its factorization.

243449984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3148 (or 3136 counting only the distinct ones).

The product of its digits is 995328, while the sum is 47.

The square root of 243449984 is about 15602.8838360093. The cubic root of 243449984 is about 624.4100964105.

The spelling of 243449984 in words is "two hundred forty-three million, four hundred forty-nine thousand, nine hundred eighty-four".