243430420 has 24 divisors (see below), whose sum is σ = 511497000. Its totient is φ = 97316352.

The previous prime is 243430417. The next prime is 243430423. The reversal of 243430420 is 24034342.

It is an interprime number because it is at equal distance from previous prime (243430417) and next prime (243430423).

It can be written as a sum of positive squares in 4 ways, for example, as 17589636 + 225840784 = 4194^2 + 15028^2 .

It is a junction number, because it is equal to n+sod(n) for n = 243430391 and 243430400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243430423) 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, 67216 + ... + 70744.

It is an arithmetic number, because the mean of its divisors is an integer number (21312375).

Almost surely, 2^243430420 is an apocalyptic number.

243430420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243430420 is an abundant number, since it is smaller than the sum of its proper divisors (268066580).

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

243430420 is a wasteful number, since it uses less digits than its factorization.

243430420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6987 (or 6985 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 243430420 is about 15602.2568880274. The cubic root of 243430420 is about 624.3933697902.

Adding to 243430420 its reverse (24034342), we get a palindrome (267464762).

The spelling of 243430420 in words is "two hundred forty-three million, four hundred thirty thousand, four hundred twenty".