622688 has 48 divisors (see below), whose sum is σ = 1406160. Its totient is φ = 268800.

The previous prime is 622669. The next prime is 622709. The reversal of 622688 is 886226.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

622688 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 (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10178 + ... + 10238.

It is an arithmetic number, because the mean of its divisors is an integer number (29295).

2⁶²²⁶⁸⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 622688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (703080).

622688 is an abundant number, since it is smaller than the sum of its proper divisors (783472).

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

622688 is a wasteful number, since it uses less digits than its factorization.

622688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111 (or 103 counting only the distinct ones).

The product of its digits is 9216, while the sum is 32.

The square root of 622688 is about 789.1058230681. The cubic root of 622688 is about 85.3932413520.

The spelling of 622688 in words is "six hundred twenty-two thousand, six hundred eighty-eight".