138410915 has 16 divisors (see below), whose sum is σ = 175764000. Its totient is φ = 104343552.

The previous prime is 138410893. The next prime is 138410927. The reversal of 138410915 is 519014831.

It is a cyclic number.

It is not a de Polignac number, because 138410915 - 2⁸ = 138410659 is a prime.

It is a super-2 number, since 2×138410915² = 38315162782274450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14561 + ... + 22109.

It is an arithmetic number, because the mean of its divisors is an integer number (10985250).

Almost surely, 2^138410915 is an apocalyptic number.

138410915 is a deficient number, since it is larger than the sum of its proper divisors (37353085).

138410915 is a wasteful number, since it uses less digits than its factorization.

138410915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7766.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 138410915 is about 11764.8168281533. The cubic root of 138410915 is about 517.2773311376.

The spelling of 138410915 in words is "one hundred thirty-eight million, four hundred ten thousand, nine hundred fifteen".