138394015 has 8 divisors (see below), whose sum is σ = 166159008. Its totient is φ = 110657760.

The previous prime is 138394007. The next prime is 138394037. The reversal of 138394015 is 510493831.

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

It is not a de Polignac number, because 138394015 - 2³ = 138394007 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, 5430 + ... + 17500.

It is an arithmetic number, because the mean of its divisors is an integer number (20769876).

Almost surely, 2^138394015 is an apocalyptic number.

138394015 is a deficient number, since it is larger than the sum of its proper divisors (27764993).

138394015 is a wasteful number, since it uses less digits than its factorization.

138394015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14369.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 138394015 is about 11764.0985630009. The cubic root of 138394015 is about 517.2562770593.

The spelling of 138394015 in words is "one hundred thirty-eight million, three hundred ninety-four thousand, fifteen".