139988838 has 16 divisors (see below), whose sum is σ = 305430336. Its totient is φ = 42420840.

The previous prime is 139988813. The next prime is 139988867. The reversal of 139988838 is 838889931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1060456 + ... + 1060587.

It is an arithmetic number, because the mean of its divisors is an integer number (19089396).

Almost surely, 2^139988838 is an apocalyptic number.

139988838 is an abundant number, since it is smaller than the sum of its proper divisors (165441498).

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

139988838 is a wasteful number, since it uses less digits than its factorization.

139988838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121059.

The product of its digits is 2985984, while the sum is 57.

The square root of 139988838 is about 11831.6878762077. The cubic root of 139988838 is about 519.2356101471.

The spelling of 139988838 in words is "one hundred thirty-nine million, nine hundred eighty-eight thousand, eight hundred thirty-eight".