618477444 has 60 divisors (see below), whose sum is σ = 1741205004. Its totient is φ = 190299456.

The previous prime is 618477443. The next prime is 618477449. The reversal of 618477444 is 444774816.

It is a happy number.

618477444 is a `hidden beast` number, since 61 + 84 + 77 + 444 = 666.

618477444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 212051844 + 406425600 = 14562^2 + 20160^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 618477444.

It is not an unprimeable number, because it can be changed into a prime (618477443) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 69207 + ... + 77630.

Almost surely, 2^618477444 is an apocalyptic number.

It is an amenable number.

618477444 is an abundant number, since it is smaller than the sum of its proper divisors (1122727560).

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

618477444 is a wasteful number, since it uses less digits than its factorization.

618477444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146866 (or 146855 counting only the distinct ones).

The product of its digits is 602112, while the sum is 45.

The square root of 618477444 is about 24869.2067424757. The cubic root of 618477444 is about 852.0033227405.

The spelling of 618477444 in words is "six hundred eighteen million, four hundred seventy-seven thousand, four hundred forty-four".