138334208 has 26 divisors (see below), whose sum is σ = 276642834. Its totient is φ = 69165056.

The previous prime is 138334171. The next prime is 138334223. The reversal of 138334208 is 802433831.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 122589184 + 15745024 = 11072^2 + 3968^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12791 + ... + 20982.

It is an arithmetic number, because the mean of its divisors is an integer number (10640109).

Almost surely, 2^138334208 is an apocalyptic number.

It is an amenable number.

138334208 is a deficient number, since it is larger than the sum of its proper divisors (138308626).

138334208 is an frugal number, since it uses more digits than its factorization.

138334208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33797 (or 33775 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 138334208 is about 11761.5563595980. The cubic root of 138334208 is about 517.1817555238.

The spelling of 138334208 in words is "one hundred thirty-eight million, three hundred thirty-four thousand, two hundred eight".