138533346 has 96 divisors (see below), whose sum is σ = 354931200. Its totient is φ = 38233728.

The previous prime is 138533309. The next prime is 138533359. The reversal of 138533346 is 643335831.

It is a self number, because there is not a number n which added to its sum of digits gives 138533346.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 882300 + ... + 882456.

It is an arithmetic number, because the mean of its divisors is an integer number (3697200).

Almost surely, 2^138533346 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138533346, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177465600).

138533346 is an abundant number, since it is smaller than the sum of its proper divisors (216397854).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138533346 is a wasteful number, since it uses less digits than its factorization.

138533346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368 (or 365 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 138533346 is about 11770.0189464588. The cubic root of 138533346 is about 517.4298049437.

The spelling of 138533346 in words is "one hundred thirty-eight million, five hundred thirty-three thousand, three hundred forty-six".