138484660 has 12 divisors (see below), whose sum is σ = 290817828. Its totient is φ = 55393856.

The previous prime is 138484651. The next prime is 138484663. The reversal of 138484660 is 66484831.

138484660 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 104121616 + 34363044 = 10204^2 + 5862^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138484663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3462097 + ... + 3462136.

It is an arithmetic number, because the mean of its divisors is an integer number (24234819).

Almost surely, 2^138484660 is an apocalyptic number.

138484660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138484660 is an abundant number, since it is smaller than the sum of its proper divisors (152333168).

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

138484660 is a wasteful number, since it uses less digits than its factorization.

138484660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6924242 (or 6924240 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 138484660 is about 11767.9505437438. The cubic root of 138484660 is about 517.3691828628.

The spelling of 138484660 in words is "one hundred thirty-eight million, four hundred eighty-four thousand, six hundred sixty".