138443371 has 16 divisors (see below), whose sum is σ = 158070528. Its totient is φ = 120023200.

The previous prime is 138443353. The next prime is 138443387. The reversal of 138443371 is 173344831.

It is not a de Polignac number, because 138443371 - 2⁷ = 138443243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138443311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116040 + ... + 117226.

It is an arithmetic number, because the mean of its divisors is an integer number (9879408).

Almost surely, 2^138443371 is an apocalyptic number.

138443371 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

138443371 is a deficient number, since it is larger than the sum of its proper divisors (19627157).

138443371 is a wasteful number, since it uses less digits than its factorization.

138443371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1682.

The product of its digits is 24192, while the sum is 34.

The square root of 138443371 is about 11766.1961142928. The cubic root of 138443371 is about 517.3177601287.

The spelling of 138443371 in words is "one hundred thirty-eight million, four hundred forty-three thousand, three hundred seventy-one".