138208854 has 16 divisors (see below), whose sum is σ = 315906048. Its totient is φ = 39488232.

The previous prime is 138208853. The next prime is 138208877. The reversal of 138208854 is 458802831.

138208854 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138208853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1645302 + ... + 1645385.

It is an arithmetic number, because the mean of its divisors is an integer number (19744128).

Almost surely, 2^138208854 is an apocalyptic number.

138208854 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

138208854 is an abundant number, since it is smaller than the sum of its proper divisors (177697194).

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

138208854 is a wasteful number, since it uses less digits than its factorization.

138208854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3290699.

The product of its (nonzero) digits is 61440, while the sum is 39.

The square root of 138208854 is about 11756.2261801992. The cubic root of 138208854 is about 517.0254905018.

The spelling of 138208854 in words is "one hundred thirty-eight million, two hundred eight thousand, eight hundred fifty-four".