620020 has 24 divisors (see below), whose sum is σ = 1348200. Its totient is φ = 239232.

The previous prime is 620003. The next prime is 620029. The reversal of 620020 is 20026.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 60516 + 559504 = 246^2 + 748^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 619979 and 620006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46 + ... + 1114.

It is an arithmetic number, because the mean of its divisors is an integer number (56175).

2⁶²⁰⁰²⁰ 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 620020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (674100).

620020 is an abundant number, since it is smaller than the sum of its proper divisors (728180).

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

620020 is a wasteful number, since it uses less digits than its factorization.

620020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107 (or 1105 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 620020 is about 787.4134873115. The cubic root of 620020 is about 85.2711067067.

Adding to 620020 its reverse (20026), we get a palindrome (640046).

The spelling of 620020 in words is "six hundred twenty thousand, twenty".