138470 has 16 divisors (see below), whose sum is σ = 254448. Its totient is φ = 54240.

The previous prime is 138469. The next prime is 138493. The reversal of 138470 is 74831.

It is a happy number.

138470 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 497 + ... + 723.

It is an arithmetic number, because the mean of its divisors is an integer number (15903).

2¹³⁸⁴⁷⁰ is an apocalyptic number.

138470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138470 is a deficient number, since it is larger than the sum of its proper divisors (115978).

138470 is a wasteful number, since it uses less digits than its factorization.

138470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 138470 is about 372.1155734446. The cubic root of 138470 is about 51.7350925967.

The spelling of 138470 in words is "one hundred thirty-eight thousand, four hundred seventy".