605664340 has 12 divisors (see below), whose sum is σ = 1271895156. Its totient is φ = 242265728.

The previous prime is 605664281. The next prime is 605664343. The reversal of 605664340 is 43466506.

It can be written as a sum of positive squares in 2 ways, for example, as 94361796 + 511302544 = 9714^2 + 22612^2 .

It is a junction number, because it is equal to n+sod(n) for n = 605664296 and 605664305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (605664343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15141589 + ... + 15141628.

It is an arithmetic number, because the mean of its divisors is an integer number (105991263).

Almost surely, 2^605664340 is an apocalyptic number.

It is an amenable number.

605664340 is an abundant number, since it is smaller than the sum of its proper divisors (666230816).

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

605664340 is a wasteful number, since it uses less digits than its factorization.

605664340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30283226 (or 30283224 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 605664340 is about 24610.2486781422. The cubic root of 605664340 is about 846.0785173415.

It can be divided in two parts, 60 and 5664340, that added together give a square (5664400 = 2380²).

The spelling of 605664340 in words is "six hundred five million, six hundred sixty-four thousand, three hundred forty".