243134440 has 16 divisors (see below), whose sum is σ = 547052580. Its totient is φ = 97253760.

The previous prime is 243134417. The next prime is 243134453. The reversal of 243134440 is 44431342.

It can be written as a sum of positive squares in 2 ways, for example, as 219573124 + 23561316 = 14818^2 + 4854^2 .

It is a super-2 number, since 2×243134440² = 118228711828227200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3039141 + ... + 3039220.

Almost surely, 2^243134440 is an apocalyptic number.

243134440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243134440 is an abundant number, since it is smaller than the sum of its proper divisors (303918140).

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

243134440 is a wasteful number, since it uses less digits than its factorization.

243134440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6078372 (or 6078368 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 243134440 is about 15592.7688368679. The cubic root of 243134440 is about 624.1402065507.

Adding to 243134440 its reverse (44431342), we get a palindrome (287565782).

The spelling of 243134440 in words is "two hundred forty-three million, one hundred thirty-four thousand, four hundred forty".