139981338 has 48 divisors (see below), whose sum is σ = 361863360. Its totient is φ = 39993912.

The previous prime is 139981327. The next prime is 139981343. The reversal of 139981338 is 833189931.

It is a happy number.

139981338 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 139981293 and 139981302.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23806 + ... + 29097.

It is an arithmetic number, because the mean of its divisors is an integer number (7538820).

Almost surely, 2^139981338 is an apocalyptic number.

139981338 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

139981338 is an abundant number, since it is smaller than the sum of its proper divisors (221882022).

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

139981338 is a wasteful number, since it uses less digits than its factorization.

139981338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52928 (or 52915 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 139981338 is about 11831.3709264819. The cubic root of 139981338 is about 519.2263371777.

The spelling of 139981338 in words is "one hundred thirty-nine million, nine hundred eighty-one thousand, three hundred thirty-eight".