609680 has 20 divisors (see below), whose sum is σ = 1417692. Its totient is φ = 243840.

The previous prime is 609673. The next prime is 609683. The reversal of 609680 is 86906.

It can be written as a sum of positive squares in 2 ways, for example, as 394384 + 215296 = 628^2 + 464^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (609683) by changing a digit.

609680 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3731 + ... + 3890.

2⁶⁰⁹⁶⁸⁰ is an apocalyptic number.

It is an amenable number.

609680 is an abundant number, since it is smaller than the sum of its proper divisors (808012).

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

609680 is a wasteful number, since it uses less digits than its factorization.

609680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7634 (or 7628 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 609680 is about 780.8200817090. The cubic root of 609680 is about 84.7944282562.

The spelling of 609680 in words is "six hundred nine thousand, six hundred eighty".