394542533 has 16 divisors (see below), whose sum is σ = 494632320. Its totient is φ = 305726400.

The previous prime is 394542509. The next prime is 394542539. The reversal of 394542533 is 335245493.

It is not a de Polignac number, because 394542533 - 2¹⁰ = 394541509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394542539) 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, 218 + ... + 28091.

It is an arithmetic number, because the mean of its divisors is an integer number (30914520).

Almost surely, 2^394542533 is an apocalyptic number.

It is an amenable number.

394542533 is a deficient number, since it is larger than the sum of its proper divisors (100089787).

394542533 is a wasteful number, since it uses less digits than its factorization.

394542533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28508.

The product of its digits is 194400, while the sum is 38.

The square root of 394542533 is about 19863.0947488049. The cubic root of 394542533 is about 733.4400301824.

The spelling of 394542533 in words is "three hundred ninety-four million, five hundred forty-two thousand, five hundred thirty-three".