138608358 has 64 divisors (see below), whose sum is σ = 330393600. Its totient is φ = 38732736.

The previous prime is 138608341. The next prime is 138608377. The reversal of 138608358 is 853806831.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96010 + ... + 97442.

It is an arithmetic number, because the mean of its divisors is an integer number (5162400).

Almost surely, 2^138608358 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138608358, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165196800).

138608358 is an abundant number, since it is smaller than the sum of its proper divisors (191785242).

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

138608358 is a wasteful number, since it uses less digits than its factorization.

138608358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506 (or 1492 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 138608358 is about 11773.2050861267. The cubic root of 138608358 is about 517.5231794327.

The spelling of 138608358 in words is "one hundred thirty-eight million, six hundred eight thousand, three hundred fifty-eight".