138634854 has 16 divisors (see below), whose sum is σ = 277729392. Its totient is φ = 46135008.

The previous prime is 138634843. The next prime is 138634861. The reversal of 138634854 is 458436831.

138634854 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15169 + ... + 22524.

It is an arithmetic number, because the mean of its divisors is an integer number (17358087).

Almost surely, 2^138634854 is an apocalyptic number.

138634854 is an abundant number, since it is smaller than the sum of its proper divisors (139094538).

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

138634854 is a wasteful number, since it uses less digits than its factorization.

138634854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38311.

The product of its digits is 276480, while the sum is 42.

The square root of 138634854 is about 11774.3302994268. The cubic root of 138634854 is about 517.5561534436.

The spelling of 138634854 in words is "one hundred thirty-eight million, six hundred thirty-four thousand, eight hundred fifty-four".