139839140 has 72 divisors (see below), whose sum is σ = 352703232. Its totient is φ = 46388160.

The previous prime is 139839121. The next prime is 139839157. The reversal of 139839140 is 41938931.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 139839094 and 139839103.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28079 + ... + 32681.

It is an arithmetic number, because the mean of its divisors is an integer number (4898656).

Almost surely, 2^139839140 is an apocalyptic number.

139839140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139839140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176351616).

139839140 is an abundant number, since it is smaller than the sum of its proper divisors (212864092).

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

139839140 is a wasteful number, since it uses less digits than its factorization.

139839140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4657 (or 4648 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 139839140 is about 11825.3600368023. The cubic root of 139839140 is about 519.0504614442.

The spelling of 139839140 in words is "one hundred thirty-nine million, eight hundred thirty-nine thousand, one hundred forty".