609808 has 10 divisors (see below), whose sum is σ = 1181534. Its totient is φ = 304896.

The previous prime is 609803. The next prime is 609809. The reversal of 609808 is 808906.

It can be written as a sum of positive squares in only one way, i.e., 535824 + 73984 = 732^2 + 272^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 609808.

It is not an unprimeable number, because it can be changed into a prime (609803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19041 + ... + 19072.

2⁶⁰⁹⁸⁰⁸ is an apocalyptic number.

It is an amenable number.

609808 is a deficient number, since it is larger than the sum of its proper divisors (571726).

609808 is a wasteful number, since it uses less digits than its factorization.

609808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38121 (or 38115 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 609808 is about 780.9020425124. The cubic root of 609808 is about 84.8003619303.

The spelling of 609808 in words is "six hundred nine thousand, eight hundred eight".