243003420 has 288 divisors, whose sum is σ = 860461056. Its totient is φ = 54950400.

The previous prime is 243003413. The next prime is 243003421. The reversal of 243003420 is 24300342.

243003420 is a `hidden beast` number, since 24 + 300 + 342 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 243003393 and 243003402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243003421) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2271007 + ... + 2271113.

It is an arithmetic number, because the mean of its divisors is an integer number (2987712).

Almost surely, 2^243003420 is an apocalyptic number.

243003420 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 243003420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (430230528).

243003420 is an abundant number, since it is smaller than the sum of its proper divisors (617457636).

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

243003420 is a wasteful number, since it uses less digits than its factorization.

243003420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 243003420 is about 15588.5669642851. The cubic root of 243003420 is about 624.0280744272.

Adding to 243003420 its reverse (24300342), we get a palindrome (267303762).

The spelling of 243003420 in words is "two hundred forty-three million, three thousand, four hundred twenty".