138511385 has 8 divisors (see below), whose sum is σ = 170079360. Its totient is φ = 108231984.

The previous prime is 138511367. The next prime is 138511447. The reversal of 138511385 is 583115831.

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

It is a cyclic number.

It is not a de Polignac number, because 138511385 - 2¹² = 138507289 is a prime.

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, 321905 + ... + 322334.

It is an arithmetic number, because the mean of its divisors is an integer number (21259920).

Almost surely, 2^138511385 is an apocalyptic number.

It is an amenable number.

138511385 is a deficient number, since it is larger than the sum of its proper divisors (31567975).

138511385 is an equidigital number, since it uses as much as digits as its factorization.

138511385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644287.

The product of its digits is 14400, while the sum is 35.

The square root of 138511385 is about 11769.0859883000. The cubic root of 138511385 is about 517.4024616439.

The spelling of 138511385 in words is "one hundred thirty-eight million, five hundred eleven thousand, three hundred eighty-five".