240139188440 has 32 divisors (see below), whose sum is σ = 563805053280. Its totient is φ = 91879341312.

The previous prime is 240139188433. The next prime is 240139188449. The reversal of 240139188440 is 44881931042.

It is a junction number, because it is equal to n+sod(n) for n = 240139188391 and 240139188400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240139188449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130509509 + ... + 130511348.

It is an arithmetic number, because the mean of its divisors is an integer number (17618907915).

Almost surely, 2^240139188440 is an apocalyptic number.

240139188440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

240139188440 is an abundant number, since it is smaller than the sum of its proper divisors (323665864840).

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

240139188440 is a wasteful number, since it uses less digits than its factorization.

240139188440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261020891 (or 261020887 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 44.

The spelling of 240139188440 in words is "two hundred forty billion, one hundred thirty-nine million, one hundred eighty-eight thousand, four hundred forty".