243400120 has 32 divisors (see below), whose sum is σ = 551602800. Its totient is φ = 96657408.

The previous prime is 243400117. The next prime is 243400121. The reversal of 243400120 is 21004342.

It is a junction number, because it is equal to n+sod(n) for n = 243400094 and 243400103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243400121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16329 + ... + 27448.

Almost surely, 2^243400120 is an apocalyptic number.

243400120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243400120 is an abundant number, since it is smaller than the sum of its proper divisors (308202680).

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

243400120 is a wasteful number, since it uses less digits than its factorization.

243400120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43927 (or 43923 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 243400120 is about 15601.2858444424. The cubic root of 243400120 is about 624.3674624500.

Adding to 243400120 its reverse (21004342), we get a palindrome (264404462).

The spelling of 243400120 in words is "two hundred forty-three million, four hundred thousand, one hundred twenty".