138622 has 8 divisors (see below), whose sum is σ = 226872. Its totient is φ = 63000.

The previous prime is 138617. The next prime is 138629. The reversal of 138622 is 226831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 6301 = 138622 / (1 + 3 + 8 + 6 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 138593 and 138602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3129 + ... + 3172.

It is an arithmetic number, because the mean of its divisors is an integer number (28359).

2¹³⁸⁶²² is an apocalyptic number.

138622 is a deficient number, since it is larger than the sum of its proper divisors (88250).

138622 is a wasteful number, since it uses less digits than its factorization.

138622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6314.

The product of its digits is 576, while the sum is 22.

The square root of 138622 is about 372.3197550493. The cubic root of 138622 is about 51.7540157292.

Subtracting 138622 from its reverse (226831), we obtain a square (88209 = 297²).

The spelling of 138622 in words is "one hundred thirty-eight thousand, six hundred twenty-two".