138530834 has 16 divisors (see below), whose sum is σ = 225212568. Its totient is φ = 63528192.

The previous prime is 138530827. The next prime is 138530837. The reversal of 138530834 is 438035831.

It can be written as a sum of positive squares in 4 ways, for example, as 122168809 + 16362025 = 11053^2 + 4045^2 .

It is a junction number, because it is equal to n+sod(n) for n = 138530794 and 138530803.

It is not an unprimeable number, because it can be changed into a prime (138530837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12887 + ... + 21050.

Almost surely, 2^138530834 is an apocalyptic number.

138530834 is a deficient number, since it is larger than the sum of its proper divisors (86681734).

138530834 is a wasteful number, since it uses less digits than its factorization.

138530834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34109.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 138530834 is about 11769.9122341673. The cubic root of 138530834 is about 517.4266774379.

The spelling of 138530834 in words is "one hundred thirty-eight million, five hundred thirty thousand, eight hundred thirty-four".