623220 has 96 divisors (see below), whose sum is σ = 2032128. Its totient is φ = 141312.

The previous prime is 623209. The next prime is 623221. The reversal of 623220 is 22326.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 623220.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 623220.

It is not an unprimeable number, because it can be changed into a prime (623221) by changing a digit.

623220 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 31 ways as a sum of consecutive naturals, for example, 13237 + ... + 13283.

It is an arithmetic number, because the mean of its divisors is an integer number (21168).

2⁶²³²²⁰ is an apocalyptic number.

623220 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 623220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1016064).

623220 is an abundant number, since it is smaller than the sum of its proper divisors (1408908).

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

623220 is a wasteful number, since it uses less digits than its factorization.

623220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89 (or 87 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 623220 is about 789.4428415028. The cubic root of 623220 is about 85.4175532990.

Adding to 623220 its reverse (22326), we get a palindrome (645546).

The spelling of 623220 in words is "six hundred twenty-three thousand, two hundred twenty".