620550 has 72 divisors (see below), whose sum is σ = 1915056. Its totient is φ = 141120.

The previous prime is 620549. The next prime is 620561. The reversal of 620550 is 55026.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 620550.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3052 + ... + 3248.

It is an arithmetic number, because the mean of its divisors is an integer number (26598).

2⁶²⁰⁵⁵⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (957528).

620550 is an abundant number, since it is smaller than the sum of its proper divisors (1294506).

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

620550 is a wasteful number, since it uses less digits than its factorization.

620550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 620550 is about 787.7499603301. The cubic root of 620550 is about 85.2953966841.

Adding to 620550 its reverse (55026), we get a palindrome (675576).

The spelling of 620550 in words is "six hundred twenty thousand, five hundred fifty".