140243440 has 40 divisors (see below), whose sum is σ = 330010128. Its totient is φ = 55418880.

The previous prime is 140243437. The next prime is 140243497. The reversal of 140243440 is 44342041.

140243440 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

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, 3921 + ... + 17200.

Almost surely, 2^140243440 is an apocalyptic number.

140243440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140243440 is an abundant number, since it is smaller than the sum of its proper divisors (189766688).

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

140243440 is a wasteful number, since it uses less digits than its factorization.

140243440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21217 (or 21211 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 140243440 is about 11842.4423156712. The cubic root of 140243440 is about 519.5502027559.

Adding to 140243440 its reverse (44342041), we get a palindrome (184585481).

The spelling of 140243440 in words is "one hundred forty million, two hundred forty-three thousand, four hundred forty".