393924392 has 16 divisors (see below), whose sum is σ = 756623700. Its totient is φ = 192158080.

The previous prime is 393924389. The next prime is 393924431. The reversal of 393924392 is 293429393.

It can be written as a sum of positive squares in 2 ways, for example, as 388326436 + 5597956 = 19706^2 + 2366^2 .

It is a super-3 number, since 3×393924392³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 3 ways as a sum of consecutive naturals, for example, 600167 + ... + 600822.

Almost surely, 2^393924392 is an apocalyptic number.

It is an amenable number.

393924392 is a deficient number, since it is larger than the sum of its proper divisors (362699308).

393924392 is a wasteful number, since it uses less digits than its factorization.

393924392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201036 (or 1201032 counting only the distinct ones).

The product of its digits is 314928, while the sum is 44.

The square root of 393924392 is about 19847.5286118952. The cubic root of 393924392 is about 733.0567961912.

The spelling of 393924392 in words is "three hundred ninety-three million, nine hundred twenty-four thousand, three hundred ninety-two".