605742644 has 18 divisors (see below), whose sum is σ = 1147865670. Its totient is φ = 279573216.

The previous prime is 605742637. The next prime is 605742647. The reversal of 605742644 is 446247506.

It can be written as a sum of positive squares in 3 ways, for example, as 9796900 + 595945744 = 3130^2 + 24412^2 .

It is a super-2 number, since 2×605742644² = 733848301520221472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 605742598 and 605742607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (605742647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 447359 + ... + 448710.

It is an arithmetic number, because the mean of its divisors is an integer number (63770315).

Almost surely, 2^605742644 is an apocalyptic number.

It is an amenable number.

605742644 is a deficient number, since it is larger than the sum of its proper divisors (542123026).

605742644 is a wasteful number, since it uses less digits than its factorization.

605742644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896099 (or 896084 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 38.

The square root of 605742644 is about 24611.8395086592. The cubic root of 605742644 is about 846.1149778433.

The spelling of 605742644 in words is "six hundred five million, seven hundred forty-two thousand, six hundred forty-four".