622818 has 24 divisors (see below), whose sum is σ = 1542528. Its totient is φ = 177912.

The previous prime is 622813. The next prime is 622849. The reversal of 622818 is 818226.

It is a super-2 number, since 2×622818² = 775804522248, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 622791 and 622800.

It is not an unprimeable number, because it can be changed into a prime (622813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2346 + ... + 2597.

It is an arithmetic number, because the mean of its divisors is an integer number (64272).

2⁶²²⁸¹⁸ is an apocalyptic number.

622818 is an abundant number, since it is smaller than the sum of its proper divisors (919710).

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

622818 is a wasteful number, since it uses less digits than its factorization.

622818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4958 (or 4955 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 622818 is about 789.1881904844. The cubic root of 622818 is about 85.3991835194.

The spelling of 622818 in words is "six hundred twenty-two thousand, eight hundred eighteen".