139239168 has 36 divisors (see below), whose sum is σ = 370581288. Its totient is φ = 46412800.

The previous prime is 139239151. The next prime is 139239173. The reversal of 139239168 is 861932931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89883 + ... + 91418.

Almost surely, 2^139239168 is an apocalyptic number.

It is an amenable number.

139239168 is an abundant number, since it is smaller than the sum of its proper divisors (231342120).

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

139239168 is an equidigital number, since it uses as much as digits as its factorization.

139239168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181320 (or 181306 counting only the distinct ones).

The product of its digits is 69984, while the sum is 42.

The square root of 139239168 is about 11799.9647457100. The cubic root of 139239168 is about 518.3070783001.

The spelling of 139239168 in words is "one hundred thirty-nine million, two hundred thirty-nine thousand, one hundred sixty-eight".