393903942 has 16 divisors (see below), whose sum is σ = 801161280. Its totient is φ = 129075752.

The previous prime is 393903919. The next prime is 393903947. The reversal of 393903942 is 249309393.

It is a junction number, because it is equal to n+sod(n) for n = 393903894 and 393903903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393903947) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 556008 + ... + 556715.

It is an arithmetic number, because the mean of its divisors is an integer number (50072580).

Almost surely, 2^393903942 is an apocalyptic number.

393903942 is an abundant number, since it is smaller than the sum of its proper divisors (407257338).

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

393903942 is a wasteful number, since it uses less digits than its factorization.

393903942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112787.

The product of its (nonzero) digits is 157464, while the sum is 42.

The square root of 393903942 is about 19847.0134277175. The cubic root of 393903942 is about 733.0441107866.

The spelling of 393903942 in words is "three hundred ninety-three million, nine hundred three thousand, nine hundred forty-two".