138145370 has 32 divisors (see below), whose sum is σ = 273096576. Its totient is φ = 49896000.

The previous prime is 138145313. The next prime is 138145379. The reversal of 138145370 is 73541831.

It is not an unprimeable number, because it can be changed into a prime (138145379) 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, 12452 + ... + 20768.

It is an arithmetic number, because the mean of its divisors is an integer number (8534268).

Almost surely, 2^138145370 is an apocalyptic number.

138145370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138145370 is a deficient number, since it is larger than the sum of its proper divisors (134951206).

138145370 is a wasteful number, since it uses less digits than its factorization.

138145370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8486.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 138145370 is about 11753.5258539725. The cubic root of 138145370 is about 516.9463159479.

The spelling of 138145370 in words is "one hundred thirty-eight million, one hundred forty-five thousand, three hundred seventy".