394919494 has 8 divisors (see below), whose sum is σ = 598244688. Its totient is φ = 195504600.

The previous prime is 394919491. The next prime is 394919531. The reversal of 394919494 is 494919493.

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

It is a super-2 number, since 2×394919494² = 311922813482432072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394919491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 977322 + ... + 977725.

It is an arithmetic number, because the mean of its divisors is an integer number (74780586).

Almost surely, 2^394919494 is an apocalyptic number.

394919494 is a deficient number, since it is larger than the sum of its proper divisors (203325194).

394919494 is a wasteful number, since it uses less digits than its factorization.

394919494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955150.

The product of its digits is 1259712, while the sum is 52.

The square root of 394919494 is about 19872.5814629101. The cubic root of 394919494 is about 733.6735413657.

Subtracting 394919494 from its reverse (494919493), we obtain a palindrome (99999999).

The spelling of 394919494 in words is "three hundred ninety-four million, nine hundred nineteen thousand, four hundred ninety-four".