394005355 has 4 divisors (see below), whose sum is σ = 472806432. Its totient is φ = 315204280.

The previous prime is 394005347. The next prime is 394005361. The reversal of 394005355 is 553500493.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 394005355 - 2³ = 394005347 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 394005355.

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 3 ways as a sum of consecutive naturals, for example, 39400531 + ... + 39400540.

It is an arithmetic number, because the mean of its divisors is an integer number (118201608).

Almost surely, 2^394005355 is an apocalyptic number.

394005355 is a deficient number, since it is larger than the sum of its proper divisors (78801077).

394005355 is an equidigital number, since it uses as much as digits as its factorization.

394005355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78801076.

The product of its (nonzero) digits is 40500, while the sum is 34.

The square root of 394005355 is about 19849.5681313222. The cubic root of 394005355 is about 733.1070142981.

The spelling of 394005355 in words is "three hundred ninety-four million, five thousand, three hundred fifty-five".