620305 has 16 divisors (see below), whose sum is σ = 875520. Its totient is φ = 412992.

The previous prime is 620303. The next prime is 620311. The reversal of 620305 is 503026.

620305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 620305 - 2¹ = 620303 is a prime.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (620303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1056 + ... + 1534.

It is an arithmetic number, because the mean of its divisors is an integer number (54720).

2⁶²⁰³⁰⁵ is an apocalyptic number.

It is an amenable number.

620305 is a deficient number, since it is larger than the sum of its proper divisors (255215).

620305 is a wasteful number, since it uses less digits than its factorization.

620305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 620305 is about 787.5944387818. The cubic root of 620305 is about 85.2841700180.

The spelling of 620305 in words is "six hundred twenty thousand, three hundred five".