394031085 has 16 divisors (see below), whose sum is σ = 720514176. Its totient is φ = 180128448.

The previous prime is 394031081. The next prime is 394031137. The reversal of 394031085 is 580130493.

It is not a de Polignac number, because 394031085 - 2² = 394031081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394031081) 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, 1876234 + ... + 1876443.

It is an arithmetic number, because the mean of its divisors is an integer number (45032136).

Almost surely, 2^394031085 is an apocalyptic number.

394031085 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

394031085 is a deficient number, since it is larger than the sum of its proper divisors (326483091).

394031085 is a wasteful number, since it uses less digits than its factorization.

394031085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3752692.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 394031085 is about 19850.2162456735. The cubic root of 394031085 is about 733.1229721463.

The spelling of 394031085 in words is "three hundred ninety-four million, thirty-one thousand, eighty-five".