394030394 has 4 divisors (see below), whose sum is σ = 591045594. Its totient is φ = 197015196.

The previous prime is 394030387. The next prime is 394030397. The reversal of 394030394 is 493030493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 493030493 = 8161 ⋅60413.

It can be written as a sum of positive squares in only one way, i.e., 232410025 + 161620369 = 15245^2 + 12713^2 .

It is not an unprimeable number, because it can be changed into a prime (394030397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98507597 + ... + 98507600.

Almost surely, 2^394030394 is an apocalyptic number.

394030394 is a deficient number, since it is larger than the sum of its proper divisors (197015200).

394030394 is a wasteful number, since it uses less digits than its factorization.

394030394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197015199.

The product of its (nonzero) digits is 34992, while the sum is 35.

The square root of 394030394 is about 19850.1988403139. The cubic root of 394030394 is about 733.1225435944.

Subtracting 394030394 from its reverse (493030493), we obtain a palindrome (99000099).

The spelling of 394030394 in words is "three hundred ninety-four million, thirty thousand, three hundred ninety-four".