243864738 has 48 divisors (see below), whose sum is σ = 571648896. Its totient is φ = 74688480.

The previous prime is 243864737. The next prime is 243864769. The reversal of 243864738 is 837468342.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 243864693 and 243864702.

It is not an unprimeable number, because it can be changed into a prime (243864737) 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 23 ways as a sum of consecutive naturals, for example, 50823 + ... + 55413.

It is an arithmetic number, because the mean of its divisors is an integer number (11909352).

Almost surely, 2^243864738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243864738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (285824448).

243864738 is an abundant number, since it is smaller than the sum of its proper divisors (327784158).

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

243864738 is a wasteful number, since it uses less digits than its factorization.

243864738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4839 (or 4836 counting only the distinct ones).

The product of its digits is 774144, while the sum is 45.

The square root of 243864738 is about 15616.1691204982. The cubic root of 243864738 is about 624.7644876921.

It can be divided in two parts, 2438 and 64738, that added together give a palindrome (67176).

The spelling of 243864738 in words is "two hundred forty-three million, eight hundred sixty-four thousand, seven hundred thirty-eight".