138487170 has 32 divisors (see below), whose sum is σ = 332683200. Its totient is φ = 36895040.

The previous prime is 138487159. The next prime is 138487177. The reversal of 138487170 is 71784831.

138487170 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (138487177) 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, 53056 + ... + 55604.

It is an arithmetic number, because the mean of its divisors is an integer number (10396350).

Almost surely, 2^138487170 is an apocalyptic number.

138487170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138487170 is an abundant number, since it is smaller than the sum of its proper divisors (194196030).

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

138487170 is a wasteful number, since it uses less digits than its factorization.

138487170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4370.

The product of its (nonzero) digits is 37632, while the sum is 39.

The square root of 138487170 is about 11768.0571888481. The cubic root of 138487170 is about 517.3723085731.

The spelling of 138487170 in words is "one hundred thirty-eight million, four hundred eighty-seven thousand, one hundred seventy".