609560640 has 448 divisors, whose sum is σ = 2379390720. Its totient is φ = 147806208.

The previous prime is 609560629. The next prime is 609560659. The reversal of 609560640 is 46065906.

It is a happy number.

609560640 is a `hidden beast` number, since 6 + 0 + 9 + 5 + 6 + 0 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 609560595 and 609560604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9097887 + ... + 9097953.

It is an arithmetic number, because the mean of its divisors is an integer number (5311140).

Almost surely, 2^609560640 is an apocalyptic number.

609560640 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 609560640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1189695360).

609560640 is an abundant number, since it is smaller than the sum of its proper divisors (1769830080).

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

609560640 is an equidigital number, since it uses as much as digits as its factorization.

609560640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 90 counting only the distinct ones).

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

The square root of 609560640 is about 24689.2818850610. The cubic root of 609560640 is about 847.8889435672. Note that the first 3 decimals are identical.

The spelling of 609560640 in words is "six hundred nine million, five hundred sixty thousand, six hundred forty".