393929394 has 64 divisors (see below), whose sum is σ = 855429120. Its totient is φ = 120528000.

The previous prime is 393929363. The next prime is 393929401. The reversal of 393929394 is 493929393.

It is a Curzon number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1266499 + ... + 1266809.

It is an arithmetic number, because the mean of its divisors is an integer number (13366080).

Almost surely, 2^393929394 is an apocalyptic number.

393929394 is an abundant number, since it is smaller than the sum of its proper divisors (461499726).

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

393929394 is a wasteful number, since it uses less digits than its factorization.

393929394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647.

The product of its digits is 1417176, while the sum is 51.

The square root of 393929394 is about 19847.6546221462. The cubic root of 393929394 is about 733.0598989309.

Subtracting 393929394 from its reverse (493929393), we obtain a palindrome (99999999).

It can be divided in two parts, 3939 and 29394, that added together give a palindrome (33333).

The spelling of 393929394 in words is "three hundred ninety-three million, nine hundred twenty-nine thousand, three hundred ninety-four".