243140940 has 216 divisors, whose sum is σ = 890587152. Its totient is φ = 55520640.

The previous prime is 243140921. The next prime is 243140941. The reversal of 243140940 is 49041342.

243140940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (243140941) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 237630 + ... + 238650.

Almost surely, 2^243140940 is an apocalyptic number.

243140940 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 243140940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (445293576).

243140940 is an abundant number, since it is smaller than the sum of its proper divisors (647446212).

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

243140940 is a wasteful number, since it uses less digits than its factorization.

243140940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059 (or 1038 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 243140940 is about 15592.9772654230. The cubic root of 243140940 is about 624.1457684601.

The spelling of 243140940 in words is "two hundred forty-three million, one hundred forty thousand, nine hundred forty".