138538874 has 8 divisors (see below), whose sum is σ = 208885620. Its totient is φ = 68910336.

The previous prime is 138538853. The next prime is 138538879. The reversal of 138538874 is 478835831.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 134397649 + 4141225 = 11593^2 + 2035^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (138538879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179069 + ... + 179840.

Almost surely, 2^138538874 is an apocalyptic number.

138538874 is a deficient number, since it is larger than the sum of its proper divisors (70346746).

138538874 is a wasteful number, since it uses less digits than its factorization.

138538874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359104.

The product of its digits is 645120, while the sum is 47.

The square root of 138538874 is about 11770.2537780627. The cubic root of 138538874 is about 517.4366873154.

The spelling of 138538874 in words is "one hundred thirty-eight million, five hundred thirty-eight thousand, eight hundred seventy-four".