138103658 has 24 divisors (see below), whose sum is σ = 262885824. Its totient is φ = 53806200.

The previous prime is 138103649. The next prime is 138103673. The reversal of 138103658 is 856301831.

138103658 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62978 + ... + 65133.

It is an arithmetic number, because the mean of its divisors is an integer number (10953576).

Almost surely, 2^138103658 is an apocalyptic number.

138103658 is a deficient number, since it is larger than the sum of its proper divisors (124782166).

138103658 is a wasteful number, since it uses less digits than its factorization.

138103658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128138 (or 128131 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 138103658 is about 11751.7512737464. The cubic root of 138103658 is about 516.8942813042.

The spelling of 138103658 in words is "one hundred thirty-eight million, one hundred three thousand, six hundred fifty-eight".