609616 has 20 divisors (see below), whose sum is σ = 1350112. Its totient is φ = 261216.

The previous prime is 609613. The next prime is 609617. The reversal of 609616 is 616906.

It is a happy number.

609616 is nontrivially palindromic in base 9.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609613) 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, 2610 + ... + 2833.

2⁶⁰⁹⁶¹⁶ is an apocalyptic number.

It is an amenable number.

609616 is an abundant number, since it is smaller than the sum of its proper divisors (740496).

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

609616 is a wasteful number, since it uses less digits than its factorization.

609616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5458 (or 5452 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 609616 is about 780.7790980809. The cubic root of 609616 is about 84.7914611077.

It can be divided in two parts, 609 and 616, that added together give a triangular number (1225 = T₄₉).

The spelling of 609616 in words is "six hundred nine thousand, six hundred sixteen".