394064481 has 8 divisors (see below), whose sum is σ = 534324960. Its totient is φ = 258256832.

The previous prime is 394064477. The next prime is 394064483. The reversal of 394064481 is 184460493.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 394064481 - 2² = 394064477 is a prime.

It is a super-2 number, since 2×394064481² = 310573630371598722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (394064483) 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 7 ways as a sum of consecutive naturals, for example, 1113000 + ... + 1113353.

It is an arithmetic number, because the mean of its divisors is an integer number (66790620).

Almost surely, 2^394064481 is an apocalyptic number.

It is an amenable number.

394064481 is a deficient number, since it is larger than the sum of its proper divisors (140260479).

394064481 is a wasteful number, since it uses less digits than its factorization.

394064481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2226415.

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 394064481 is about 19851.0574277543. The cubic root of 394064481 is about 733.1436834421.

The spelling of 394064481 in words is "three hundred ninety-four million, sixty-four thousand, four hundred eighty-one".