243040420 has 48 divisors (see below), whose sum is σ = 599074560. Its totient is φ = 81074304.

The previous prime is 243040393. The next prime is 243040439. The reversal of 243040420 is 24040342.

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, 18280 + ... + 28639.

It is an arithmetic number, because the mean of its divisors is an integer number (12480720).

Almost surely, 2^243040420 is an apocalyptic number.

243040420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243040420 is an abundant number, since it is smaller than the sum of its proper divisors (356034140).

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

243040420 is a wasteful number, since it uses less digits than its factorization.

243040420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46972 (or 46970 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 243040420 is about 15589.7536863159. The cubic root of 243040420 is about 624.0597445809.

Adding to 243040420 its reverse (24040342), we get a palindrome (267080762).

The spelling of 243040420 in words is "two hundred forty-three million, forty thousand, four hundred twenty".