622650 has 48 divisors (see below), whose sum is σ = 1767744. Its totient is φ = 142080.

The previous prime is 622639. The next prime is 622663. The reversal of 622650 is 56226.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

622650 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 23 ways as a sum of consecutive naturals, for example, 754 + ... + 1346.

It is an arithmetic number, because the mean of its divisors is an integer number (36828).

2⁶²²⁶⁵⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 622650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (883872).

622650 is an abundant number, since it is smaller than the sum of its proper divisors (1145094).

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

622650 is a wasteful number, since it uses less digits than its factorization.

622650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615 (or 610 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 622650 is about 789.0817448148. The cubic root of 622650 is about 85.3915042546.

Adding to 622650 its reverse (56226), we get a palindrome (678876).

The spelling of 622650 in words is "six hundred twenty-two thousand, six hundred fifty".