138784422 has 32 divisors (see below), whose sum is σ = 323212032. Its totient is φ = 38903904.

The previous prime is 138784409. The next prime is 138784423. The reversal of 138784422 is 224487831.

It is a super-2 number, since 2×138784422² = 38522231579748168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138784423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28948 + ... + 33399.

It is an arithmetic number, because the mean of its divisors is an integer number (10100376).

Almost surely, 2^138784422 is an apocalyptic number.

138784422 is an abundant number, since it is smaller than the sum of its proper divisors (184427610).

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

138784422 is a wasteful number, since it uses less digits than its factorization.

138784422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62412.

The product of its digits is 86016, while the sum is 39.

The square root of 138784422 is about 11780.6800313055. The cubic root of 138784422 is about 517.7422105930.

The spelling of 138784422 in words is "one hundred thirty-eight million, seven hundred eighty-four thousand, four hundred twenty-two".