394168389 has 8 divisors (see below), whose sum is σ = 529570272. Its totient is φ = 260772720.

The previous prime is 394168381. The next prime is 394168399. The reversal of 394168389 is 983861493.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 394168389 - 2³ = 394168381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394168381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 501094 + ... + 501879.

It is an arithmetic number, because the mean of its divisors is an integer number (66196284).

Almost surely, 2^394168389 is an apocalyptic number.

It is an amenable number.

394168389 is a deficient number, since it is larger than the sum of its proper divisors (135401883).

394168389 is a wasteful number, since it uses less digits than its factorization.

394168389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003107.

The product of its digits is 1119744, while the sum is 51.

The square root of 394168389 is about 19853.6744458047. The cubic root of 394168389 is about 733.2081168896.

The spelling of 394168389 in words is "three hundred ninety-four million, one hundred sixty-eight thousand, three hundred eighty-nine".