8218858 has 4 divisors (see below), whose sum is σ = 12328290. Its totient is φ = 4109428.

The previous prime is 8218853. The next prime is 8218897. The reversal of 8218858 is 8588128.

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., 4635409 + 3583449 = 2153^2 + 1893^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8218858.

It is not an unprimeable number, because it can be changed into a prime (8218853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2054713 + ... + 2054716.

Almost surely, 2^8218858 is an apocalyptic number.

8218858 is a deficient number, since it is larger than the sum of its proper divisors (4109432).

8218858 is a wasteful number, since it uses less digits than its factorization.

8218858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4109431.

The product of its digits is 40960, while the sum is 40.

The square root of 8218858 is about 2866.8550713282. The cubic root of 8218858 is about 201.8074333849.

The spelling of 8218858 in words is "eight million, two hundred eighteen thousand, eight hundred fifty-eight".