138670015 has 8 divisors (see below), whose sum is σ = 181531728. Its totient is φ = 100850880.

The previous prime is 138669989. The next prime is 138670027. The reversal of 138670015 is 510076831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138670015 - 2⁵ = 138669983 is a prime.

It is a Duffinian number.

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, 1260582 + ... + 1260691.

It is an arithmetic number, because the mean of its divisors is an integer number (22691466).

Almost surely, 2^138670015 is an apocalyptic number.

138670015 is a deficient number, since it is larger than the sum of its proper divisors (42861713).

138670015 is a wasteful number, since it uses less digits than its factorization.

138670015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2521289.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 138670015 is about 11775.8233257807. The cubic root of 138670015 is about 517.5999044753.

The spelling of 138670015 in words is "one hundred thirty-eight million, six hundred seventy thousand, fifteen".