621008 has 20 divisors (see below), whose sum is σ = 1236900. Its totient is φ = 301824.

The previous prime is 621007. The next prime is 621013. The reversal of 621008 is 800126.

621008 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 559504 + 61504 = 748^2 + 248^2 .

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68 + ... + 1116.

It is an arithmetic number, because the mean of its divisors is an integer number (61845).

2⁶²¹⁰⁰⁸ is an apocalyptic number.

It is an amenable number.

621008 is a deficient number, since it is larger than the sum of its proper divisors (615892).

621008 is a wasteful number, since it uses less digits than its factorization.

621008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094 (or 1088 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 621008 is about 788.0406080907. The cubic root of 621008 is about 85.3163757536.

The spelling of 621008 in words is "six hundred twenty-one thousand, eight".