609656220 has 120 divisors (see below), whose sum is σ = 1920996000. Its totient is φ = 161854848.

The previous prime is 609656213. The next prime is 609656231. The reversal of 609656220 is 22656906.

609656220 is a `hidden beast` number, since 6 + 0 + 96 + 562 + 2 + 0 = 666.

609656220 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 (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 435081 + ... + 436479.

It is an arithmetic number, because the mean of its divisors is an integer number (16008300).

Almost surely, 2^609656220 is an apocalyptic number.

609656220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 609656220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (960498000).

609656220 is an abundant number, since it is smaller than the sum of its proper divisors (1311339780).

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

609656220 is a wasteful number, since it uses less digits than its factorization.

609656220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689 (or 1678 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 609656220 is about 24691.2174669456. The cubic root of 609656220 is about 847.9332579933.

The spelling of 609656220 in words is "six hundred nine million, six hundred fifty-six thousand, two hundred twenty".