139126638 has 16 divisors (see below), whose sum is σ = 318003840. Its totient is φ = 39750456.

The previous prime is 139126633. The next prime is 139126679. The reversal of 139126638 is 836621931.

It is a junction number, because it is equal to n+sod(n) for n = 139126596 and 139126605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139126633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1656228 + ... + 1656311.

It is an arithmetic number, because the mean of its divisors is an integer number (19875240).

Almost surely, 2^139126638 is an apocalyptic number.

139126638 is an abundant number, since it is smaller than the sum of its proper divisors (178877202).

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

139126638 is a wasteful number, since it uses less digits than its factorization.

139126638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3312551.

The product of its digits is 46656, while the sum is 39.

The square root of 139126638 is about 11795.1955473405. The cubic root of 139126638 is about 518.1674125825.

The spelling of 139126638 in words is "one hundred thirty-nine million, one hundred twenty-six thousand, six hundred thirty-eight".