393924689956 has 12 divisors (see below), whose sum is σ = 787849379968. Its totient is φ = 168824867112.

The previous prime is 393924689933. The next prime is 393924689957. The reversal of 393924689956 is 659986429393.

393924689956 is an admirable number.

It is a super-2 number, since 2×393924689956² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (393924689957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7034369436 + ... + 7034369491.

Almost surely, 2^393924689956 is an apocalyptic number.

It is an amenable number.

393924689956 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

393924689956 is a wasteful number, since it uses less digits than its factorization.

393924689956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14068738938 (or 14068738936 counting only the distinct ones).

The product of its digits is 680244480, while the sum is 73.

The spelling of 393924689956 in words is "three hundred ninety-three billion, nine hundred twenty-four million, six hundred eighty-nine thousand, nine hundred fifty-six".