394097456 has 40 divisors (see below), whose sum is σ = 799100640. Its totient is φ = 187928576.

The previous prime is 394097447. The next prime is 394097461. The reversal of 394097456 is 654790493.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 394097456.

It is an unprimeable number.

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, 141776 + ... + 144528.

It is an arithmetic number, because the mean of its divisors is an integer number (19977516).

Almost surely, 2^394097456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394097456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (399550320).

394097456 is an abundant number, since it is smaller than the sum of its proper divisors (405003184).

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

394097456 is a wasteful number, since it uses less digits than its factorization.

394097456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3173 (or 3167 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 47.

The square root of 394097456 is about 19851.8879706692. The cubic root of 394097456 is about 733.1641324971.

The spelling of 394097456 in words is "three hundred ninety-four million, ninety-seven thousand, four hundred fifty-six".