140638 has 8 divisors (see below), whose sum is σ = 222120. Its totient is φ = 66600.

The previous prime is 140629. The next prime is 140639. The reversal of 140638 is 836041.

140638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1813 + ... + 1888.

It is an arithmetic number, because the mean of its divisors is an integer number (27765).

2¹⁴⁰⁶³⁸ is an apocalyptic number.

140638 is a deficient number, since it is larger than the sum of its proper divisors (81482).

140638 is a wasteful number, since it uses less digits than its factorization.

140638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3722.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 140638 is about 375.0173329328. The cubic root of 140638 is about 52.0036979619.

Adding to 140638 its reverse (836041), we get a palindrome (976679).

It can be divided in two parts, 1406 and 38, that added together give a square (1444 = 38²).

The spelling of 140638 in words is "one hundred forty thousand, six hundred thirty-eight".