394840475 has 12 divisors (see below), whose sum is σ = 490001376. Its totient is φ = 315614880.

The previous prime is 394840469. The next prime is 394840493. The reversal of 394840475 is 574048493.

It is not a de Polignac number, because 394840475 - 2¹⁰ = 394839451 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28574 + ... + 40076.

It is an arithmetic number, because the mean of its divisors is an integer number (40833448).

Almost surely, 2^394840475 is an apocalyptic number.

394840475 is a deficient number, since it is larger than the sum of its proper divisors (95160901).

394840475 is a wasteful number, since it uses less digits than its factorization.

394840475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12886 (or 12881 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 44.

The square root of 394840475 is about 19870.5932221461. The cubic root of 394840475 is about 733.6246047955.

The spelling of 394840475 in words is "three hundred ninety-four million, eight hundred forty thousand, four hundred seventy-five".