140438 has 16 divisors (see below), whose sum is σ = 228096. Its totient is φ = 64680.

The previous prime is 140423. The next prime is 140443. The reversal of 140438 is 834041.

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

140438 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1943 + ... + 2013.

It is an arithmetic number, because the mean of its divisors is an integer number (14256).

2¹⁴⁰⁴³⁸ is an apocalyptic number.

140438 is a deficient number, since it is larger than the sum of its proper divisors (87658).

140438 is a wasteful number, since it uses less digits than its factorization.

140438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 140438 is about 374.7505837220. The cubic root of 140438 is about 51.9790349411.

Adding to 140438 its reverse (834041), we get a palindrome (974479).

The spelling of 140438 in words is "one hundred forty thousand, four hundred thirty-eight".