243124420 has 96 divisors (see below), whose sum is σ = 650280960. Its totient is φ = 74144640.

The previous prime is 243124417. The next prime is 243124439. The reversal of 243124420 is 24421342.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 243124391 and 243124400.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70701 + ... + 74059.

It is an arithmetic number, because the mean of its divisors is an integer number (6773760).

Almost surely, 2^243124420 is an apocalyptic number.

243124420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243124420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325140480).

243124420 is an abundant number, since it is smaller than the sum of its proper divisors (407156540).

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

243124420 is a wasteful number, since it uses less digits than its factorization.

243124420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3433 (or 3431 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 243124420 is about 15592.4475307759. The cubic root of 243124420 is about 624.1316324593.

Adding to 243124420 its reverse (24421342), we get a palindrome (267545762).

The spelling of 243124420 in words is "two hundred forty-three million, one hundred twenty-four thousand, four hundred twenty".