138062208 has 128 divisors (see below), whose sum is σ = 391680000. Its totient is φ = 42964992.

The previous prime is 138062203. The next prime is 138062233. The reversal of 138062208 is 802260831.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×138062208² = 38122346555670528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138062203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 926518 + ... + 926666.

It is an arithmetic number, because the mean of its divisors is an integer number (3060000).

Almost surely, 2^138062208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138062208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195840000).

138062208 is an abundant number, since it is smaller than the sum of its proper divisors (253617792).

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

138062208 is a wasteful number, since it uses less digits than its factorization.

138062208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 138062208 is about 11749.9875744615. The cubic root of 138062208 is about 516.8425631186.

The spelling of 138062208 in words is "one hundred thirty-eight million, sixty-two thousand, two hundred eight".