243200040 has 64 divisors (see below), whose sum is σ = 743385600. Its totient is φ = 63628032.

The previous prime is 243200039. The next prime is 243200051. The reversal of 243200040 is 40002342.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 243199992 and 243200019.

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, 12760 + ... + 25479.

It is an arithmetic number, because the mean of its divisors is an integer number (11615400).

Almost surely, 2^243200040 is an apocalyptic number.

243200040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243200040 is an abundant number, since it is smaller than the sum of its proper divisors (500185560).

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

243200040 is a wasteful number, since it uses less digits than its factorization.

243200040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38306 (or 38302 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 243200040 is about 15594.8722341672. The cubic root of 243200040 is about 624.1963345044.

Adding to 243200040 its reverse (40002342), we get a palindrome (283202382).

The spelling of 243200040 in words is "two hundred forty-three million, two hundred thousand, forty".