138180285 has 24 divisors (see below), whose sum is σ = 245085984. Its totient is φ = 71981280.

The previous prime is 138180277. The next prime is 138180307. The reversal of 138180285 is 582081831.

It is not a de Polignac number, because 138180285 - 2³ = 138180277 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33771 + ... + 37640.

It is an arithmetic number, because the mean of its divisors is an integer number (10211916).

Almost surely, 2^138180285 is an apocalyptic number.

138180285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138180285 is a deficient number, since it is larger than the sum of its proper divisors (106905699).

138180285 is a wasteful number, since it uses less digits than its factorization.

138180285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71465 (or 71462 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The square root of 138180285 is about 11755.0110591186. The cubic root of 138180285 is about 516.9898634570.

The spelling of 138180285 in words is "one hundred thirty-eight million, one hundred eighty thousand, two hundred eighty-five".