605720 has 32 divisors (see below), whose sum is σ = 1436400. Its totient is φ = 229248.

The previous prime is 605719. The next prime is 605779. The reversal of 605720 is 27506.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 605692 and 605701.

It is a congruent number.

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, 362 + ... + 1158.

2⁶⁰⁵⁷²⁰ 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 605720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (718200).

605720 is an abundant number, since it is smaller than the sum of its proper divisors (830680).

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

605720 is a wasteful number, since it uses less digits than its factorization.

605720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827 (or 823 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 605720 is about 778.2801552140. The cubic root of 605720 is about 84.6104434495.

It can be divided in two parts, 605 and 720, that multiplied together give a square (435600 = 660²).

The spelling of 605720 in words is "six hundred five thousand, seven hundred twenty".