138628134 has 24 divisors (see below), whose sum is σ = 307688472. Its totient is φ = 45082080.

The previous prime is 138628121. The next prime is 138628141. The reversal of 138628134 is 431826831.

138628134 is a `hidden beast` number, since 13 + 8 + 628 + 13 + 4 = 666.

It is a congruent number.

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, 93184 + ... + 94659.

It is an arithmetic number, because the mean of its divisors is an integer number (12820353).

Almost surely, 2^138628134 is an apocalyptic number.

138628134 is an abundant number, since it is smaller than the sum of its proper divisors (169060338).

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

138628134 is a wasteful number, since it uses less digits than its factorization.

138628134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187892 (or 187889 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 138628134 is about 11774.0449294200. The cubic root of 138628134 is about 517.5477908675.

The spelling of 138628134 in words is "one hundred thirty-eight million, six hundred twenty-eight thousand, one hundred thirty-four".