243024140 has 24 divisors (see below), whose sum is σ = 524145552. Its totient is φ = 94582080.

The previous prime is 243024139. The next prime is 243024143. The reversal of 243024140 is 41420342.

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

It is not an unprimeable number, because it can be changed into a prime (243024143) 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, 163466 + ... + 164945.

It is an arithmetic number, because the mean of its divisors is an integer number (21839398).

Almost surely, 2^243024140 is an apocalyptic number.

243024140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243024140 is an abundant number, since it is smaller than the sum of its proper divisors (281121412).

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

243024140 is a wasteful number, since it uses less digits than its factorization.

243024140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328457 (or 328455 counting only the distinct ones).

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

The square root of 243024140 is about 15589.2315397520. The cubic root of 243024140 is about 624.0458101093.

Adding to 243024140 its reverse (41420342), we get a palindrome (284444482).

The spelling of 243024140 in words is "two hundred forty-three million, twenty-four thousand, one hundred forty".