243302420 has 24 divisors (see below), whose sum is σ = 511980000. Its totient is φ = 97121952.

The previous prime is 243302413. The next prime is 243302443. The reversal of 243302420 is 24203342.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 243302392 and 243302401.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2210 + ... + 22169.

It is an arithmetic number, because the mean of its divisors is an integer number (21332500).

Almost surely, 2^243302420 is an apocalyptic number.

243302420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243302420 is an abundant number, since it is smaller than the sum of its proper divisors (268677580).

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

243302420 is a wasteful number, since it uses less digits than its factorization.

243302420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24887 (or 24885 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 243302420 is about 15598.1543780025. The cubic root of 243302420 is about 624.2839115945.

Adding to 243302420 its reverse (24203342), we get a palindrome (267505762).

The spelling of 243302420 in words is "two hundred forty-three million, three hundred two thousand, four hundred twenty".