393638779212 has 48 divisors (see below), whose sum is σ = 1064082926592. Its totient is φ = 110927560320.

The previous prime is 393638779109. The next prime is 393638779229. The reversal of 393638779212 is 212977836393.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32090964 + ... + 32103227.

It is an arithmetic number, because the mean of its divisors is an integer number (22168394304).

Almost surely, 2^393638779212 is an apocalyptic number.

It is an amenable number.

393638779212 is an abundant number, since it is smaller than the sum of its proper divisors (670444147380).

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

393638779212 is a wasteful number, since it uses less digits than its factorization.

393638779212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64194278 (or 64194276 counting only the distinct ones).

The product of its digits is 20575296, while the sum is 60.

The spelling of 393638779212 in words is "three hundred ninety-three billion, six hundred thirty-eight million, seven hundred seventy-nine thousand, two hundred twelve".