393978355368 has 48 divisors (see below), whose sum is σ = 1066539049920. Its totient is φ = 121224108096.

The previous prime is 393978355363. The next prime is 393978355411. The reversal of 393978355368 is 863553879393.

It is not an unprimeable number, because it can be changed into a prime (393978355363) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48563296 + ... + 48571407.

It is an arithmetic number, because the mean of its divisors is an integer number (22219563540).

Almost surely, 2^393978355368 is an apocalyptic number.

It is an amenable number.

393978355368 is an abundant number, since it is smaller than the sum of its proper divisors (672560694552).

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

393978355368 is a wasteful number, since it uses less digits than its factorization.

393978355368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97134738 (or 97134721 counting only the distinct ones).

The product of its digits is 440899200, while the sum is 69.

The spelling of 393978355368 in words is "three hundred ninety-three billion, nine hundred seventy-eight million, three hundred fifty-five thousand, three hundred sixty-eight".