139039838 has 32 divisors (see below), whose sum is σ = 253036224. Its totient is φ = 55936512.

The previous prime is 139039837. The next prime is 139039843. The reversal of 139039838 is 838930931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139039837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174056 + ... + 174852.

It is an arithmetic number, because the mean of its divisors is an integer number (7907382).

Almost surely, 2^139039838 is an apocalyptic number.

139039838 is a deficient number, since it is larger than the sum of its proper divisors (113996386).

139039838 is a wasteful number, since it uses less digits than its factorization.

139039838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 139039838 is about 11791.5155090429. The cubic root of 139039838 is about 518.0596299923.

The spelling of 139039838 in words is "one hundred thirty-nine million, thirty-nine thousand, eight hundred thirty-eight".