605491840 has 32 divisors (see below), whose sum is σ = 1447505460. Its totient is φ = 242196480.

The previous prime is 605491837. The next prime is 605491847. The reversal of 605491840 is 48194506.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 563397696 + 42094144 = 23736^2 + 6488^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 605491840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (605491847) 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, 472401 + ... + 473680.

Almost surely, 2^605491840 is an apocalyptic number.

It is an amenable number.

605491840 is an abundant number, since it is smaller than the sum of its proper divisors (842013620).

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

605491840 is an equidigital number, since it uses as much as digits as its factorization.

605491840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946100 (or 946088 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 605491840 is about 24606.7437910830. The cubic root of 605491840 is about 845.9981854961.

The spelling of 605491840 in words is "six hundred five million, four hundred ninety-one thousand, eight hundred forty".