138019380 has 24 divisors (see below), whose sum is σ = 386454432. Its totient is φ = 36805152.

The previous prime is 138019369. The next prime is 138019391. The reversal of 138019380 is 83910831.

It is an interprime number because it is at equal distance from previous prime (138019369) and next prime (138019391).

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, 1150102 + ... + 1150221.

It is an arithmetic number, because the mean of its divisors is an integer number (16102268).

Almost surely, 2^138019380 is an apocalyptic number.

138019380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138019380 is an abundant number, since it is smaller than the sum of its proper divisors (248435052).

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

138019380 is a wasteful number, since it uses less digits than its factorization.

138019380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2300335 (or 2300333 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 138019380 is about 11748.1649630910. The cubic root of 138019380 is about 516.7891146940.

The spelling of 138019380 in words is "one hundred thirty-eight million, nineteen thousand, three hundred eighty".