394629819 has 8 divisors (see below), whose sum is σ = 535091520. Its totient is φ = 258627336.

The previous prime is 394629793. The next prime is 394629821. The reversal of 394629819 is 918926493.

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

It is not a de Polignac number, because 394629819 - 2⁷ = 394629691 is a prime.

It is a super-2 number, since 2×394629819² = 311465388087945522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (394629839) 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, 1114597 + ... + 1114950.

It is an arithmetic number, because the mean of its divisors is an integer number (66886440).

Almost surely, 2^394629819 is an apocalyptic number.

394629819 is a deficient number, since it is larger than the sum of its proper divisors (140461701).

394629819 is a wasteful number, since it uses less digits than its factorization.

394629819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2229609.

The product of its digits is 839808, while the sum is 51.

The square root of 394629819 is about 19865.2918176401. The cubic root of 394629819 is about 733.4941133468.

The spelling of 394629819 in words is "three hundred ninety-four million, six hundred twenty-nine thousand, eight hundred nineteen".