8220558 has 8 divisors (see below), whose sum is σ = 16441128. Its totient is φ = 2740184.

The previous prime is 8220557. The next prime is 8220577. The reversal of 8220558 is 8550228.

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

8220558 is an admirable number.

It is a super-3 number, since 3×8220558³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8220551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 685041 + ... + 685052.

It is an arithmetic number, because the mean of its divisors is an integer number (2055141).

Almost surely, 2^8220558 is an apocalyptic number.

8220558 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8220558 is a wasteful number, since it uses less digits than its factorization.

8220558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1370098.

The product of its (nonzero) digits is 6400, while the sum is 30.

The square root of 8220558 is about 2867.1515481397. The cubic root of 8220558 is about 201.8213464689.

It can be divided in two parts, 8220 and 558, that added together give a palindrome (8778).

The spelling of 8220558 in words is "eight million, two hundred twenty thousand, five hundred fifty-eight".