394949394 has 24 divisors (see below), whose sum is σ = 977970240. Its totient is φ = 112842648.

The previous prime is 394949329. The next prime is 394949407. The reversal of 394949394 is 493949493.

It is a self number, because there is not a number n which added to its sum of digits gives 394949394.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1567134 + ... + 1567385.

It is an arithmetic number, because the mean of its divisors is an integer number (40748760).

Almost surely, 2^394949394 is an apocalyptic number.

394949394 is an abundant number, since it is smaller than the sum of its proper divisors (583020846).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

394949394 is a wasteful number, since it uses less digits than its factorization.

394949394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3134534 (or 3134531 counting only the distinct ones).

The product of its digits is 3779136, while the sum is 54.

The square root of 394949394 is about 19873.3337414738. Note that the first 3 decimals coincide. The cubic root of 394949394 is about 733.6920567726.

Subtracting 394949394 from its reverse (493949493), we obtain a palindrome (99000099).

The spelling of 394949394 in words is "three hundred ninety-four million, nine hundred forty-nine thousand, three hundred ninety-four".