609400 has 48 divisors (see below), whose sum is σ = 1551240. Its totient is φ = 220800.

The previous prime is 609397. The next prime is 609403. The reversal of 609400 is 4906.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (609397) and next prime (609403).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2062 + ... + 2338.

2⁶⁰⁹⁴⁰⁰ 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 609400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (775620).

609400 is an abundant number, since it is smaller than the sum of its proper divisors (941840).

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

609400 is a wasteful number, since it uses less digits than its factorization.

609400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304 (or 295 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 609400 is about 780.6407624509. The cubic root of 609400 is about 84.7814454480.

The spelling of 609400 in words is "six hundred nine thousand, four hundred".