138689148 has 48 divisors (see below), whose sum is σ = 349282976. Its totient is φ = 42577920.

The previous prime is 138689143. The next prime is 138689197. The reversal of 138689148 is 841986831.

It is a junction number, because it is equal to n+sod(n) for n = 138689097 and 138689106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138689143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104328 + ... + 105648.

Almost surely, 2^138689148 is an apocalyptic number.

It is an amenable number.

138689148 is an abundant number, since it is smaller than the sum of its proper divisors (210593828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138689148 is a wasteful number, since it uses less digits than its factorization.

138689148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2014 (or 2012 counting only the distinct ones).

The product of its digits is 331776, while the sum is 48.

The square root of 138689148 is about 11776.6356825708. The cubic root of 138689148 is about 517.6237086686.

The spelling of 138689148 in words is "one hundred thirty-eight million, six hundred eighty-nine thousand, one hundred forty-eight".