243030040 has 32 divisors (see below), whose sum is σ = 596529360. Its totient is φ = 88374400.

The previous prime is 243030037. The next prime is 243030041. The reversal of 243030040 is 40030342.

It is a junction number, because it is equal to n+sod(n) for n = 243029996 and 243030023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243030041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275731 + ... + 276610.

Almost surely, 2^243030040 is an apocalyptic number.

243030040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243030040 is an abundant number, since it is smaller than the sum of its proper divisors (353499320).

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

243030040 is a wasteful number, since it uses less digits than its factorization.

243030040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552363 (or 552359 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 243030040 is about 15589.4207717926. The cubic root of 243030040 is about 624.0508601433.

Adding to 243030040 its reverse (40030342), we get a palindrome (283060382).

The spelling of 243030040 in words is "two hundred forty-three million, thirty thousand, forty".