620720 has 20 divisors (see below), whose sum is σ = 1443360. Its totient is φ = 248256.

The previous prime is 620717. The next prime is 620731. The reversal of 620720 is 27026.

It is a tau number, because it is divible by the number of its divisors (20).

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 620720.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3800 + ... + 3959.

It is an arithmetic number, because the mean of its divisors is an integer number (72168).

2⁶²⁰⁷²⁰ is an apocalyptic number.

It is an amenable number.

620720 is an abundant number, since it is smaller than the sum of its proper divisors (822640).

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

620720 is a wasteful number, since it uses less digits than its factorization.

620720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7772 (or 7766 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 620720 is about 787.8578551998. The cubic root of 620720 is about 85.3031848793.

Adding to 620720 its reverse (27026), we get a palindrome (647746).

The spelling of 620720 in words is "six hundred twenty thousand, seven hundred twenty".