138526680 has 96 divisors (see below), whose sum is σ = 423356400. Its totient is φ = 36261120.

The previous prime is 138526679. The next prime is 138526697. The reversal of 138526680 is 86625831.

It is a happy number.

138526680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 604806 + ... + 605034.

Almost surely, 2^138526680 is an apocalyptic number.

138526680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138526680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211678200).

138526680 is an abundant number, since it is smaller than the sum of its proper divisors (284829720).

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

138526680 is a wasteful number, since it uses less digits than its factorization.

138526680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 138526680 is about 11769.7357659380. The cubic root of 138526680 is about 517.4215055162.

The spelling of 138526680 in words is "one hundred thirty-eight million, five hundred twenty-six thousand, six hundred eighty".