609389568 has 264 divisors, whose sum is σ = 1907476480. Its totient is φ = 194088960.

The previous prime is 609389567. The next prime is 609389591. The reversal of 609389568 is 865983906.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (609389567) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7713753 + ... + 7713831.

Almost surely, 2^609389568 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 609389568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (953738240).

609389568 is an abundant number, since it is smaller than the sum of its proper divisors (1298086912).

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

609389568 is an equidigital number, since it uses as much as digits as its factorization.

609389568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The square root of 609389568 is about 24685.8171426429. The cubic root of 609389568 is about 847.8096166885.

The spelling of 609389568 in words is "six hundred nine million, three hundred eighty-nine thousand, five hundred sixty-eight".