8218258 has 4 divisors (see below), whose sum is σ = 12327390. Its totient is φ = 4109128.

The previous prime is 8218253. The next prime is 8218277. The reversal of 8218258 is 8528128.

It is a happy number.

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., 4190209 + 4028049 = 2047^2 + 2007^2 .

It is not an unprimeable number, because it can be changed into a prime (8218253) 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, 2054563 + ... + 2054566.

Almost surely, 2^8218258 is an apocalyptic number.

8218258 is a deficient number, since it is larger than the sum of its proper divisors (4109132).

8218258 is a wasteful number, since it uses less digits than its factorization.

8218258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4109131.

The product of its digits is 10240, while the sum is 34.

The square root of 8218258 is about 2866.7504251330. The cubic root of 8218258 is about 201.8025224266.

The spelling of 8218258 in words is "eight million, two hundred eighteen thousand, two hundred fifty-eight".