618478244 has 24 divisors (see below), whose sum is σ = 1120686840. Its totient is φ = 298301696.

The previous prime is 618478243. The next prime is 618478249. The reversal of 618478244 is 442874816.

618478244 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 4 ways, for example, as 53465344 + 565012900 = 7312^2 + 23770^2 .

It is a junction number, because it is equal to n+sod(n) for n = 618478195 and 618478204.

It is not an unprimeable number, because it can be changed into a prime (618478243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188264 + ... + 191520.

It is an arithmetic number, because the mean of its divisors is an integer number (46695285).

Almost surely, 2^618478244 is an apocalyptic number.

It is an amenable number.

618478244 is a deficient number, since it is larger than the sum of its proper divisors (502208596).

618478244 is a wasteful number, since it uses less digits than its factorization.

618478244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4927 (or 4925 counting only the distinct ones).

The product of its digits is 344064, while the sum is 44.

The square root of 618478244 is about 24869.2228266184. Note that the first 3 decimals coincide. The cubic root of 618478244 is about 852.0036900955.

The spelling of 618478244 in words is "six hundred eighteen million, four hundred seventy-eight thousand, two hundred forty-four".