8228138 has 4 divisors (see below), whose sum is σ = 12342210. Its totient is φ = 4114068.

The previous prime is 8228131. The next prime is 8228147. The reversal of 8228138 is 8318228.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5938969 + 2289169 = 2437^2 + 1513^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8228131) 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 as a sum of consecutive naturals, namely, 2057033 + ... + 2057036.

Almost surely, 2^8228138 is an apocalyptic number.

8228138 is a deficient number, since it is larger than the sum of its proper divisors (4114072).

8228138 is a wasteful number, since it uses less digits than its factorization.

8228138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4114071.

The product of its digits is 6144, while the sum is 32.

The square root of 8228138 is about 2868.4731129993. The cubic root of 8228138 is about 201.8833591225.

The spelling of 8228138 in words is "eight million, two hundred twenty-eight thousand, one hundred thirty-eight".