394004393619 has 16 divisors (see below), whose sum is σ = 555512100864. Its totient is φ = 247996468800.

The previous prime is 394004393609. The next prime is 394004393633. The reversal of 394004393619 is 916393400493.

It is not a de Polignac number, because 394004393619 - 2⁷ = 394004393491 is a prime.

It is a super-2 number, since 2×394004393619² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (394004393609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51662119 + ... + 51669744.

It is an arithmetic number, because the mean of its divisors is an integer number (34719506304).

Almost surely, 2^394004393619 is an apocalyptic number.

394004393619 is a deficient number, since it is larger than the sum of its proper divisors (161507707245).

394004393619 is a wasteful number, since it uses less digits than its factorization.

394004393619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103331938.

The product of its (nonzero) digits is 1889568, while the sum is 51.

The spelling of 394004393619 in words is "three hundred ninety-four billion, four million, three hundred ninety-three thousand, six hundred nineteen".