626220 has 108 divisors (see below), whose sum is σ = 2240784. Its totient is φ = 141120.

The previous prime is 626207. The next prime is 626239. The reversal of 626220 is 22626.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 626193 and 626202.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 626220.

It is an unprimeable number.

626220 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8785 + ... + 8855.

It is an arithmetic number, because the mean of its divisors is an integer number (20748).

2⁶²⁶²²⁰ is an apocalyptic number.

626220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 626220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1120392).

626220 is an abundant number, since it is smaller than the sum of its proper divisors (1614564).

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

626220 is a wasteful number, since it uses less digits than its factorization.

626220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 626220 is about 791.3406346195. The cubic root of 626220 is about 85.5543923931.

Adding to 626220 its reverse (22626), we get a palindrome (648846).

The spelling of 626220 in words is "six hundred twenty-six thousand, two hundred twenty".