138727842 has 32 divisors (see below), whose sum is σ = 303333120. Its totient is φ = 41947920.

The previous prime is 138727817. The next prime is 138727859. The reversal of 138727842 is 248727831.

It is a junction number, because it is equal to n+sod(n) for n = 138727794 and 138727803.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32509 + ... + 36527.

It is an arithmetic number, because the mean of its divisors is an integer number (9479160).

Almost surely, 2^138727842 is an apocalyptic number.

138727842 is an abundant number, since it is smaller than the sum of its proper divisors (164605278).

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

138727842 is a wasteful number, since it uses less digits than its factorization.

138727842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4558.

The product of its digits is 150528, while the sum is 42.

The square root of 138727842 is about 11778.2783971173. The cubic root of 138727842 is about 517.6718428586.

The spelling of 138727842 in words is "one hundred thirty-eight million, seven hundred twenty-seven thousand, eight hundred forty-two".