138786222 has 16 divisors (see below), whose sum is σ = 292181760. Its totient is φ = 43827192.

The previous prime is 138786191. The next prime is 138786233. The reversal of 138786222 is 222687831.

138786222 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 an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 608598 + ... + 608825.

It is an arithmetic number, because the mean of its divisors is an integer number (18261360).

Almost surely, 2^138786222 is an apocalyptic number.

138786222 is an abundant number, since it is smaller than the sum of its proper divisors (153395538).

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

138786222 is a wasteful number, since it uses less digits than its factorization.

138786222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217447.

The product of its digits is 64512, while the sum is 39.

The square root of 138786222 is about 11780.7564273267. The cubic root of 138786222 is about 517.7444489133.

It can be divided in two parts, 13878 and 6222, that added together give a triangular number (20100 = T₂₀₀).

The spelling of 138786222 in words is "one hundred thirty-eight million, seven hundred eighty-six thousand, two hundred twenty-two".