621608 has 32 divisors (see below), whose sum is σ = 1293600. Its totient is φ = 278208.

The previous prime is 621583. The next prime is 621611. The reversal of 621608 is 806126.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 621608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4403 + ... + 4541.

It is an arithmetic number, because the mean of its divisors is an integer number (40425).

2⁶²¹⁶⁰⁸ 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 621608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (646800).

621608 is an abundant number, since it is smaller than the sum of its proper divisors (671992).

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

621608 is a wasteful number, since it uses less digits than its factorization.

621608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 621608 is about 788.4212072237. The cubic root of 621608 is about 85.3438436490.

The spelling of 621608 in words is "six hundred twenty-one thousand, six hundred eight".