394403829 has 4 divisors (see below), whose sum is σ = 525871776. Its totient is φ = 262935884.

The previous prime is 394403803. The next prime is 394403851. The reversal of 394403829 is 928304493.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 394403829 - 2¹⁷ = 394272757 is a prime.

It is a super-2 number, since 2×394403829² = 311108760659722482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394403879) 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 3 ways as a sum of consecutive naturals, for example, 65733969 + ... + 65733974.

It is an arithmetic number, because the mean of its divisors is an integer number (131467944).

Almost surely, 2^394403829 is an apocalyptic number.

It is an amenable number.

394403829 is a deficient number, since it is larger than the sum of its proper divisors (131467947).

394403829 is a wasteful number, since it uses less digits than its factorization.

394403829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131467946.

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 394403829 is about 19859.6029416502. The cubic root of 394403829 is about 733.3540715669.

The spelling of 394403829 in words is "three hundred ninety-four million, four hundred three thousand, eight hundred twenty-nine".