394675333218 has 48 divisors (see below), whose sum is σ = 887613906816. Its totient is φ = 131437902960.

The previous prime is 394675333211. The next prime is 394675333229. The reversal of 394675333218 is 812333576493.

394675333218 is a `hidden beast` number, since 3 + 9 + 4 + 67 + 533 + 32 + 18 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (394675333211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159703 + ... + 902693.

It is an arithmetic number, because the mean of its divisors is an integer number (18491956392).

Almost surely, 2^394675333218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394675333218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (443806953408).

394675333218 is an abundant number, since it is smaller than the sum of its proper divisors (492938573598).

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

394675333218 is a wasteful number, since it uses less digits than its factorization.

394675333218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744101 (or 744089 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 54.

The spelling of 394675333218 in words is "three hundred ninety-four billion, six hundred seventy-five million, three hundred thirty-three thousand, two hundred eighteen".