139357238 has 32 divisors (see below), whose sum is σ = 224674560. Its totient is φ = 64703520.

The previous prime is 139357201. The next prime is 139357247. The reversal of 139357238 is 832753931.

It is a junction number, because it is equal to n+sod(n) for n = 139357195 and 139357204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176681 + ... + 177467.

It is an arithmetic number, because the mean of its divisors is an integer number (7021080).

Almost surely, 2^139357238 is an apocalyptic number.

139357238 is a deficient number, since it is larger than the sum of its proper divisors (85317322).

139357238 is a wasteful number, since it uses less digits than its factorization.

139357238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932.

The product of its digits is 136080, while the sum is 41.

The square root of 139357238 is about 11804.9666666196. The cubic root of 139357238 is about 518.4535390703.

The spelling of 139357238 in words is "one hundred thirty-nine million, three hundred fifty-seven thousand, two hundred thirty-eight".