8219138 has 8 divisors (see below), whose sum is σ = 12411900. Its totient is φ = 4081840.

The previous prime is 8219137. The next prime is 8219171. The reversal of 8219138 is 8319128.

It can be written as a sum of positive squares in 2 ways, for example, as 8048569 + 170569 = 2837^2 + 413^2 .

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

It is not an unprimeable number, because it can be changed into a prime (8219131) 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, 13493 + ... + 14088.

Almost surely, 2^8219138 is an apocalyptic number.

8219138 is a deficient number, since it is larger than the sum of its proper divisors (4192762).

8219138 is a wasteful number, since it uses less digits than its factorization.

8219138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27732.

The product of its digits is 3456, while the sum is 32.

The square root of 8219138 is about 2866.9039049121. The cubic root of 8219138 is about 201.8097250836.

The spelling of 8219138 in words is "eight million, two hundred nineteen thousand, one hundred thirty-eight".