138260870 has 16 divisors (see below), whose sum is σ = 271494288. Its totient is φ = 50276640.

The previous prime is 138260869. The next prime is 138260911. The reversal of 138260870 is 78062831.

138260870 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 138260870.

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 7 ways as a sum of consecutive naturals, for example, 628349 + ... + 628568.

It is an arithmetic number, because the mean of its divisors is an integer number (16968393).

Almost surely, 2^138260870 is an apocalyptic number.

138260870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138260870 is a deficient number, since it is larger than the sum of its proper divisors (133233418).

138260870 is a wasteful number, since it uses less digits than its factorization.

138260870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256935.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 138260870 is about 11758.4382466380. The cubic root of 138260870 is about 517.0903445831.

The spelling of 138260870 in words is "one hundred thirty-eight million, two hundred sixty thousand, eight hundred seventy".