138028670 has 16 divisors (see below), whose sum is σ = 267563520. Its totient is φ = 50964384.

The previous prime is 138028663. The next prime is 138028687. The reversal of 138028670 is 76820831.

138028670 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 138028670.

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, 530750 + ... + 531009.

It is an arithmetic number, because the mean of its divisors is an integer number (16722720).

Almost surely, 2^138028670 is an apocalyptic number.

138028670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138028670 is a deficient number, since it is larger than the sum of its proper divisors (129534850).

138028670 is a wasteful number, since it uses less digits than its factorization.

138028670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061779.

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

The square root of 138028670 is about 11748.5603373350. The cubic root of 138028670 is about 516.8007093536.

The spelling of 138028670 in words is "one hundred thirty-eight million, twenty-eight thousand, six hundred seventy".