138765270 has 32 divisors (see below), whose sum is σ = 380613888. Its totient is φ = 31717728.

The previous prime is 138765259. The next prime is 138765299. The reversal of 138765270 is 72567831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 330184 + ... + 330603.

It is an arithmetic number, because the mean of its divisors is an integer number (11894184).

Almost surely, 2^138765270 is an apocalyptic number.

138765270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138765270 is an abundant number, since it is smaller than the sum of its proper divisors (241848618).

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

138765270 is a wasteful number, since it uses less digits than its factorization.

138765270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660804.

The product of its (nonzero) digits is 70560, while the sum is 39.

The square root of 138765270 is about 11779.8671469588. The cubic root of 138765270 is about 517.7183936669.

The spelling of 138765270 in words is "one hundred thirty-eight million, seven hundred sixty-five thousand, two hundred seventy".