139830 has 32 divisors (see below), whose sum is σ = 345600. Its totient is φ = 36192.

The previous prime is 139813. The next prime is 139831. The reversal of 139830 is 38931.

139830 is nontrivially palindromic in base 11.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 139830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139831) by changing a digit.

139830 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 15 ways as a sum of consecutive naturals, for example, 1731 + ... + 1809.

It is an arithmetic number, because the mean of its divisors is an integer number (10800).

2¹³⁹⁸³⁰ is an apocalyptic number.

139830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 139830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172800).

139830 is an abundant number, since it is smaller than the sum of its proper divisors (205770).

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

139830 is a wasteful number, since it uses less digits than its factorization.

139830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 139830 is about 373.9384976169. The cubic root of 139830 is about 51.9039152678.

It can be divided in two parts, 139 and 830, that added together give a palindrome (969).

The spelling of 139830 in words is "one hundred thirty-nine thousand, eight hundred thirty".