138207270 has 32 divisors (see below), whose sum is σ = 332294400. Its totient is φ = 36788960.

The previous prime is 138207241. The next prime is 138207271. The reversal of 138207270 is 72702831.

138207270 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138207271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14125 + ... + 21815.

It is an arithmetic number, because the mean of its divisors is an integer number (10384200).

Almost surely, 2^138207270 is an apocalyptic number.

138207270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138207270 is an abundant number, since it is smaller than the sum of its proper divisors (194087130).

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

138207270 is a wasteful number, since it uses less digits than its factorization.

138207270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8300.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 138207270 is about 11756.1588114486. The cubic root of 138207270 is about 517.0235152991.

The spelling of 138207270 in words is "one hundred thirty-eight million, two hundred seven thousand, two hundred seventy".