243439968 has 48 divisors (see below), whose sum is σ = 644713776. Its totient is φ = 80424960.

The previous prime is 243439967. The next prime is 243439969. The reversal of 243439968 is 869934342.

It is an interprime number because it is at equal distance from previous prime (243439967) and next prime (243439969).

It is a tau number, because it is divible by the number of its divisors (48).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243439967) 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, 373 + ... + 22068.

It is an arithmetic number, because the mean of its divisors is an integer number (13431537).

Almost surely, 2^243439968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243439968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322356888).

243439968 is an abundant number, since it is smaller than the sum of its proper divisors (401273808).

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

243439968 is a wasteful number, since it uses less digits than its factorization.

243439968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22567 (or 22559 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 48.

The square root of 243439968 is about 15602.5628664011. The cubic root of 243439968 is about 624.4015331495.

The spelling of 243439968 in words is "two hundred forty-three million, four hundred thirty-nine thousand, nine hundred sixty-eight".