139938 has 16 divisors (see below), whose sum is σ = 284256. Its totient is φ = 45920.

The previous prime is 139921. The next prime is 139939. The reversal of 139938 is 839931.

It is a junction number, because it is equal to n+sod(n) for n = 139899 and 139908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139939) 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, 358 + ... + 638.

It is an arithmetic number, because the mean of its divisors is an integer number (17766).

2¹³⁹⁹³⁸ is an apocalyptic number.

139938 is an abundant number, since it is smaller than the sum of its proper divisors (144318).

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

139938 is a wasteful number, since it uses less digits than its factorization.

139938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369.

The product of its digits is 5832, while the sum is 33.

The square root of 139938 is about 374.0828785176. The cubic root of 139938 is about 51.9172747764.

The spelling of 139938 in words is "one hundred thirty-nine thousand, nine hundred thirty-eight".