622720 has 64 divisors (see below), whose sum is σ = 1713600. Its totient is φ = 211968.

The previous prime is 622709. The next prime is 622723. The reversal of 622720 is 27226.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

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

622720 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 7 ways as a sum of consecutive naturals, for example, 4411 + ... + 4549.

It is an arithmetic number, because the mean of its divisors is an integer number (26775).

2⁶²²⁷²⁰ 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 622720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (856800).

622720 is an abundant number, since it is smaller than the sum of its proper divisors (1090880).

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

622720 is a wasteful number, since it uses less digits than its factorization.

622720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 622720 is about 789.1260989221. The cubic root of 622720 is about 85.3947041161.

Multiplying 622720 by its sum of digits (19), we get a triangular number (11831680 = T₄₈₆₄).

Adding to 622720 its reverse (27226), we get a palindrome (649946).

The spelling of 622720 in words is "six hundred twenty-two thousand, seven hundred twenty".