138706704 has 30 divisors (see below), whose sum is σ = 388186526. Its totient is φ = 46235520.

The previous prime is 138706703. The next prime is 138706717. The reversal of 138706704 is 407607831.

It can be written as a sum of positive squares in only one way, i.e., 83174400 + 55532304 = 9120^2 + 7452^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (138706703) 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 5 ways as a sum of consecutive naturals, for example, 481477 + ... + 481764.

Almost surely, 2^138706704 is an apocalyptic number.

It is an amenable number.

138706704 is an abundant number, since it is smaller than the sum of its proper divisors (249479822).

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

138706704 is a wasteful number, since it uses less digits than its factorization.

138706704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963255 (or 963246 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 138706704 is about 11777.3810331499. The cubic root of 138706704 is about 517.6455489220.

The spelling of 138706704 in words is "one hundred thirty-eight million, seven hundred six thousand, seven hundred four".