243033420040 has 64 divisors (see below), whose sum is σ = 565979400000. Its totient is φ = 93811710720.

The previous prime is 243033420023. The next prime is 243033420059. The reversal of 243033420040 is 40024330342.

It is a junction number, because it is equal to n+sod(n) for n = 243033419987 and 243033420014.

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, 2185711 + ... + 2294209.

It is an arithmetic number, because the mean of its divisors is an integer number (8843428125).

Almost surely, 2^243033420040 is an apocalyptic number.

243033420040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243033420040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282989700000).

243033420040 is an abundant number, since it is smaller than the sum of its proper divisors (322945979960).

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

243033420040 is a wasteful number, since it uses less digits than its factorization.

243033420040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110470 (or 110466 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 25.

Adding to 243033420040 its reverse (40024330342), we get a palindrome (283057750382).

The spelling of 243033420040 in words is "two hundred forty-three billion, thirty-three million, four hundred twenty thousand, forty".