138371385 has 16 divisors (see below), whose sum is σ = 221563584. Its totient is φ = 73741632.

The previous prime is 138371371. The next prime is 138371399. The reversal of 138371385 is 583173831.

138371385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (138371371) and next prime (138371399).

It is not a de Polignac number, because 138371385 - 2¹² = 138367289 is a prime.

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, 23334 + ... + 28656.

It is an arithmetic number, because the mean of its divisors is an integer number (13847724).

Almost surely, 2^138371385 is an apocalyptic number.

138371385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138371385 is a deficient number, since it is larger than the sum of its proper divisors (83192199).

138371385 is a wasteful number, since it uses less digits than its factorization.

138371385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7064.

The product of its digits is 60480, while the sum is 39.

The square root of 138371385 is about 11763.1366990272. The cubic root of 138371385 is about 517.2280818428.

The spelling of 138371385 in words is "one hundred thirty-eight million, three hundred seventy-one thousand, three hundred eighty-five".