138765415 has 8 divisors (see below), whose sum is σ = 168167808. Its totient is φ = 109912800.

The previous prime is 138765397. The next prime is 138765427. The reversal of 138765415 is 514567831.

It is a happy number.

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

It is not a de Polignac number, because 138765415 - 2⁹ = 138764903 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, 136887 + ... + 137896.

It is an arithmetic number, because the mean of its divisors is an integer number (21020976).

Almost surely, 2^138765415 is an apocalyptic number.

138765415 is a deficient number, since it is larger than the sum of its proper divisors (29402393).

138765415 is a wasteful number, since it uses less digits than its factorization.

138765415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274889.

The product of its digits is 100800, while the sum is 40.

The square root of 138765415 is about 11779.8733015258. The cubic root of 138765415 is about 517.7185739933.

It can be divided in two parts, 13876 and 5415, that added together give a palindrome (19291).

The spelling of 138765415 in words is "one hundred thirty-eight million, seven hundred sixty-five thousand, four hundred fifteen".