243534040 has 16 divisors (see below), whose sum is σ = 547951680. Its totient is φ = 97413600.

The previous prime is 243534023. The next prime is 243534043. The reversal of 243534040 is 40435342.

It is a super-3 number, since 3×243534040³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243533996 and 243534014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243534043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3044136 + ... + 3044215.

It is an arithmetic number, because the mean of its divisors is an integer number (34246980).

Almost surely, 2^243534040 is an apocalyptic number.

243534040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243534040 is an abundant number, since it is smaller than the sum of its proper divisors (304417640).

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

243534040 is a wasteful number, since it uses less digits than its factorization.

243534040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6088362 (or 6088358 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 243534040 is about 15605.5772081650. The cubic root of 243534040 is about 624.4819515199.

Adding to 243534040 its reverse (40435342), we get a palindrome (283969382).

The spelling of 243534040 in words is "two hundred forty-three million, five hundred thirty-four thousand, forty".