138533285 has 8 divisors (see below), whose sum is σ = 181352736. Its totient is φ = 100751440.

The previous prime is 138533273. The next prime is 138533309. The reversal of 138533285 is 582335831.

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

It is not a de Polignac number, because 138533285 - 2¹² = 138529189 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, 1259339 + ... + 1259448.

It is an arithmetic number, because the mean of its divisors is an integer number (22669092).

Almost surely, 2^138533285 is an apocalyptic number.

It is an amenable number.

138533285 is a deficient number, since it is larger than the sum of its proper divisors (42819451).

138533285 is a wasteful number, since it uses less digits than its factorization.

138533285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2518803.

The product of its digits is 86400, while the sum is 38.

The square root of 138533285 is about 11770.0163551288. The cubic root of 138533285 is about 517.4297289976.

The spelling of 138533285 in words is "one hundred thirty-eight million, five hundred thirty-three thousand, two hundred eighty-five".