243440120 has 64 divisors (see below), whose sum is σ = 682905600. Its totient is φ = 75876480.

The previous prime is 243440111. The next prime is 243440137. The reversal of 243440120 is 21044342.

243440120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×243440120² = 118526184051228800, which contains 22 as substring.

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 = 243440092 and 243440101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36440 + ... + 42599.

It is an arithmetic number, because the mean of its divisors is an integer number (10670400).

Almost surely, 2^243440120 is an apocalyptic number.

243440120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243440120 is an abundant number, since it is smaller than the sum of its proper divisors (439465480).

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

243440120 is a wasteful number, since it uses less digits than its factorization.

243440120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79068 (or 79064 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 243440120 is about 15602.5677373950. The cubic root of 243440120 is about 624.4016631049.

Adding to 243440120 its reverse (21044342), we get a palindrome (264484462).

The spelling of 243440120 in words is "two hundred forty-three million, four hundred forty thousand, one hundred twenty".