243210404040 has 64 divisors (see below), whose sum is σ = 729826156800. Its totient is φ = 64838779392.

The previous prime is 243210404029. The next prime is 243210404051. The reversal of 243210404040 is 40404012342.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (243210404029) and next prime (243210404051).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 243210404040.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183409 + ... + 721151.

It is an arithmetic number, because the mean of its divisors is an integer number (11403533700).

Almost surely, 2^243210404040 is an apocalyptic number.

243210404040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243210404040 is an abundant number, since it is smaller than the sum of its proper divisors (486615752760).

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

243210404040 is a wasteful number, since it uses less digits than its factorization.

243210404040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541526 (or 541522 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 243210404040 its reverse (40404012342), we get a palindrome (283614416382).

The spelling of 243210404040 in words is "two hundred forty-three billion, two hundred ten million, four hundred four thousand, forty".