620406 has 16 divisors (see below), whose sum is σ = 1378800. Its totient is φ = 206784.

The previous prime is 620401. The next prime is 620413. The reversal of 620406 is 604026.

620406 is a `hidden beast` number, since 620 + 40 + 6 = 666.

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

It is a nialpdrome in base 16.

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 620406.

It is not an unprimeable number, because it can be changed into a prime (620401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5691 + ... + 5798.

It is an arithmetic number, because the mean of its divisors is an integer number (86175).

2⁶²⁰⁴⁰⁶ is an apocalyptic number.

620406 is an abundant number, since it is smaller than the sum of its proper divisors (758394).

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

620406 is a wasteful number, since it uses less digits than its factorization.

620406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11500 (or 11494 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 620406 is about 787.6585554668. The cubic root of 620406 is about 85.2887985119.

The spelling of 620406 in words is "six hundred twenty thousand, four hundred six".