243500340 has 24 divisors (see below), whose sum is σ = 681801120. Its totient is φ = 64933408.

The previous prime is 243500303. The next prime is 243500359. The reversal of 243500340 is 43005342.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2029110 + ... + 2029229.

It is an arithmetic number, because the mean of its divisors is an integer number (28408380).

Almost surely, 2^243500340 is an apocalyptic number.

243500340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243500340 is an abundant number, since it is smaller than the sum of its proper divisors (438300780).

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

243500340 is a wasteful number, since it uses less digits than its factorization.

243500340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4058351 (or 4058349 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 243500340 is about 15604.4974286261. The cubic root of 243500340 is about 624.4531451258.

Adding to 243500340 its reverse (43005342), we get a palindrome (286505682).

The spelling of 243500340 in words is "two hundred forty-three million, five hundred thousand, three hundred forty".