138587018 has 16 divisors (see below), whose sum is σ = 209571840. Its totient is φ = 68732496.

The previous prime is 138587003. The next prime is 138587023. The reversal of 138587018 is 810785831.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 182696 + ... + 183452.

It is an arithmetic number, because the mean of its divisors is an integer number (13098240).

Almost surely, 2^138587018 is an apocalyptic number.

138587018 is a deficient number, since it is larger than the sum of its proper divisors (70984822).

138587018 is a wasteful number, since it uses less digits than its factorization.

138587018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1381.

The product of its (nonzero) digits is 53760, while the sum is 41.

The square root of 138587018 is about 11772.2987559780. The cubic root of 138587018 is about 517.4966189577.

The spelling of 138587018 in words is "one hundred thirty-eight million, five hundred eighty-seven thousand, eighteen".