394530399 has 16 divisors (see below), whose sum is σ = 585331200. Its totient is φ = 262641528.

The previous prime is 394530391. The next prime is 394530403. The reversal of 394530399 is 993035493.

It is not a de Polignac number, because 394530399 - 2³ = 394530391 is a prime.

It is a super-3 number, since 3×394530399³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394530391) 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, 9252 + ... + 29574.

It is an arithmetic number, because the mean of its divisors is an integer number (36583200).

Almost surely, 2^394530399 is an apocalyptic number.

394530399 is a deficient number, since it is larger than the sum of its proper divisors (190800801).

394530399 is a wasteful number, since it uses less digits than its factorization.

394530399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21051 (or 21045 counting only the distinct ones).

The product of its (nonzero) digits is 393660, while the sum is 45.

The square root of 394530399 is about 19862.7893056338. The cubic root of 394530399 is about 733.4325112190.

The spelling of 394530399 in words is "three hundred ninety-four million, five hundred thirty thousand, three hundred ninety-nine".