609870 has 32 divisors (see below), whose sum is σ = 1516320. Its totient is φ = 156800.

The previous prime is 609859. The next prime is 609877. The reversal of 609870 is 78906.

It is a happy number.

609870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 609870.

It is not an unprimeable number, because it can be changed into a prime (609877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 520 + ... + 1220.

It is an arithmetic number, because the mean of its divisors is an integer number (47385).

2⁶⁰⁹⁸⁷⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 609870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (758160).

609870 is an abundant number, since it is smaller than the sum of its proper divisors (906450).

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

609870 is a wasteful number, since it uses less digits than its factorization.

609870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 609870 is about 780.9417391842. The cubic root of 609870 is about 84.8032357553.

The spelling of 609870 in words is "six hundred nine thousand, eight hundred seventy".