394188336 has 80 divisors (see below), whose sum is σ = 1148438400. Its totient is φ = 129425472.

The previous prime is 394188317. The next prime is 394188337. The reversal of 394188336 is 633881493.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 394188291 and 394188300.

It is not an unprimeable number, because it can be changed into a prime (394188337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22135 + ... + 35753.

It is an arithmetic number, because the mean of its divisors is an integer number (14355480).

Almost surely, 2^394188336 is an apocalyptic number.

394188336 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394188336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (574219200).

394188336 is an abundant number, since it is smaller than the sum of its proper divisors (754250064).

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

394188336 is a wasteful number, since it uses less digits than its factorization.

394188336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13703 (or 13691 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 394188336 is about 19854.1767897841. The cubic root of 394188336 is about 733.2204847473.

The spelling of 394188336 in words is "three hundred ninety-four million, one hundred eighty-eight thousand, three hundred thirty-six".