393448376 has 8 divisors (see below), whose sum is σ = 737715720. Its totient is φ = 196724184.

The previous prime is 393448351. The next prime is 393448381. The reversal of 393448376 is 673844393.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 393448376.

It is a congruent 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 as a sum of consecutive naturals, namely, 24590516 + ... + 24590531.

It is an arithmetic number, because the mean of its divisors is an integer number (92214465).

Almost surely, 2^393448376 is an apocalyptic number.

It is an amenable number.

393448376 is a deficient number, since it is larger than the sum of its proper divisors (344267344).

393448376 is a wasteful number, since it uses less digits than its factorization.

393448376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49181053 (or 49181049 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 47.

The square root of 393448376 is about 19835.5331665171. The cubic root of 393448376 is about 732.7614032845.

The spelling of 393448376 in words is "three hundred ninety-three million, four hundred forty-eight thousand, three hundred seventy-six".