138958710 has 64 divisors (see below), whose sum is σ = 365036544. Its totient is φ = 33574400.

The previous prime is 138958693. The next prime is 138958711. The reversal of 138958710 is 17859831.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138958711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141742 + ... + 142718.

It is an arithmetic number, because the mean of its divisors is an integer number (5703696).

Almost surely, 2^138958710 is an apocalyptic number.

138958710 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 138958710, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182518272).

138958710 is an abundant number, since it is smaller than the sum of its proper divisors (226077834).

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

138958710 is a wasteful number, since it uses less digits than its factorization.

138958710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1429.

The product of its (nonzero) digits is 60480, while the sum is 42.

The square root of 138958710 is about 11788.0749064468. The cubic root of 138958710 is about 517.9588499583.

The spelling of 138958710 in words is "one hundred thirty-eight million, nine hundred fifty-eight thousand, seven hundred ten".