622728 has 60 divisors (see below), whose sum is σ = 1802295. Its totient is φ = 200880.

The previous prime is 622723. The next prime is 622729. The reversal of 622728 is 827226.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 311364 + 311364 = 558^2 + 558^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=558.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (622723) by changing a digit.

622728 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 14 ways as a sum of consecutive naturals, for example, 20073 + ... + 20103.

2⁶²²⁷²⁸ 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 622728

622728 is an abundant number, since it is smaller than the sum of its proper divisors (1179567).

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

622728 is a wasteful number, since it uses less digits than its factorization.

622728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80 (or 36 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 622728 is about 789.1311678042. The cubic root of 622728 is about 85.3950697993.

The spelling of 622728 in words is "six hundred twenty-two thousand, seven hundred twenty-eight".