243400120140 has 24 divisors (see below), whose sum is σ = 681520336560. Its totient is φ = 64906698688.

The previous prime is 243400120123. The next prime is 243400120151. The reversal of 243400120140 is 41021004342.

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, 2028334275 + ... + 2028334394.

It is an arithmetic number, because the mean of its divisors is an integer number (28396680690).

Almost surely, 2^243400120140 is an apocalyptic number.

243400120140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243400120140 is an abundant number, since it is smaller than the sum of its proper divisors (438120216420).

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

243400120140 is a wasteful number, since it uses less digits than its factorization.

243400120140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4056668681 (or 4056668679 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 243400120140 its reverse (41021004342), we get a palindrome (284421124482).

The spelling of 243400120140 in words is "two hundred forty-three billion, four hundred million, one hundred twenty thousand, one hundred forty".