243420000 has 120 divisors (see below), whose sum is σ = 798663096. Its totient is φ = 64896000.

The previous prime is 243419989. The next prime is 243420041. The reversal of 243420000 is 24342.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 57972 + ... + 62028.

Almost surely, 2^243420000 is an apocalyptic number.

243420000 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 243420000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (399331548).

243420000 is an abundant number, since it is smaller than the sum of its proper divisors (555243096).

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

243420000 is an equidigital number, since it uses as much as digits as its factorization.

243420000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4090 (or 4067 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 243420000 is about 15601.9229584048. The cubic root of 243420000 is about 624.3844606438.

Adding to 243420000 its reverse (24342), we get a palindrome (243444342).

Multiplying 243420000 by its reverse (24342), we get a square (5925329640000 = 2434200²).

243420000 divided by its reverse (24342) gives a 4-th power (10000 = 10⁴).

The spelling of 243420000 in words is "two hundred forty-three million, four hundred twenty thousand".