393878395 has 16 divisors (see below), whose sum is σ = 481500000. Its totient is φ = 309224448.

The previous prime is 393878363. The next prime is 393878411. The reversal of 393878395 is 593878393.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 393878395 - 2⁵ = 393878363 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 314731 + ... + 315979.

It is an arithmetic number, because the mean of its divisors is an integer number (30093750).

Almost surely, 2^393878395 is an apocalyptic number.

393878395 is a deficient number, since it is larger than the sum of its proper divisors (87621605).

393878395 is a wasteful number, since it uses less digits than its factorization.

393878395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2382.

The product of its digits is 4898880, while the sum is 55.

The square root of 393878395 is about 19846.3698191886. The cubic root of 393878395 is about 733.0282630288.

The spelling of 393878395 in words is "three hundred ninety-three million, eight hundred seventy-eight thousand, three hundred ninety-five".