138494938 has 8 divisors (see below), whose sum is σ = 208291680. Its totient is φ = 69064380.

The previous prime is 138494927. The next prime is 138494969. The reversal of 138494938 is 839494831.

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

It is a junction number, because it is equal to n+sod(n) for n = 138494891 and 138494900.

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 3 ways as a sum of consecutive naturals, for example, 90598 + ... + 92113.

It is an arithmetic number, because the mean of its divisors is an integer number (26036460).

Almost surely, 2^138494938 is an apocalyptic number.

138494938 is a deficient number, since it is larger than the sum of its proper divisors (69796742).

138494938 is a wasteful number, since it uses less digits than its factorization.

138494938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183092.

The product of its digits is 746496, while the sum is 49.

The square root of 138494938 is about 11768.3872302028. The cubic root of 138494938 is about 517.3819818469.

The spelling of 138494938 in words is "one hundred thirty-eight million, four hundred ninety-four thousand, nine hundred thirty-eight".