617620 has 12 divisors (see below), whose sum is σ = 1297044. Its totient is φ = 247040.

The previous prime is 617587. The next prime is 617647. The reversal of 617620 is 26716.

It can be written as a sum of positive squares in 2 ways, for example, as 446224 + 171396 = 668^2 + 414^2 .

It is a junction number, because it is equal to n+sod(n) for n = 617591 and 617600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15421 + ... + 15460.

It is an arithmetic number, because the mean of its divisors is an integer number (108087).

2⁶¹⁷⁶²⁰ is an apocalyptic number.

It is an amenable number.

617620 is an abundant number, since it is smaller than the sum of its proper divisors (679424).

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

617620 is a wasteful number, since it uses less digits than its factorization.

617620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30890 (or 30888 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 617620 is about 785.8880327375. Note that the first 3 decimals coincide. The cubic root of 617620 is about 85.1609407539.

The spelling of 617620 in words is "six hundred seventeen thousand, six hundred twenty".