609980 has 24 divisors (see below), whose sum is σ = 1464288. Its totient is φ = 209088.

The previous prime is 609979. The next prime is 609989. The reversal of 609980 is 89906.

609980 = T₁₄₉ + T₁₅₀ + ... + T₁₉₀.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2039 + ... + 2318.

It is an arithmetic number, because the mean of its divisors is an integer number (61012).

2⁶⁰⁹⁹⁸⁰ is an apocalyptic number.

It is an amenable number.

609980 is an abundant number, since it is smaller than the sum of its proper divisors (854308).

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

609980 is a wasteful number, since it uses less digits than its factorization.

609980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4373 (or 4371 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 609980 is about 781.0121637977. The cubic root of 609980 is about 84.8083339976.

The spelling of 609980 in words is "six hundred nine thousand, nine hundred eighty".