394778325324972 has 24 divisors (see below), whose sum is σ = 923517419151600. Its totient is φ = 131254490337856.

The previous prime is 394778325324959. The next prime is 394778325325049. The reversal of 394778325324972 is 279423523877493.

It is a happy number.

It is a super-2 number, since 2×394778325324972² (a number of 30 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (75) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 394778325324894 and 394778325324903.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42285591447 + ... + 42285600782.

It is an arithmetic number, because the mean of its divisors is an integer number (38479892464650).

Almost surely, 2^{394778325324972} is an apocalyptic number.

It is an amenable number.

394778325324972 is an abundant number, since it is smaller than the sum of its proper divisors (528739093826628).

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

394778325324972 is a wasteful number, since it uses less digits than its factorization.

394778325324972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84571192625 (or 84571192623 counting only the distinct ones).

The product of its digits is 3840721920, while the sum is 75.

The spelling of 394778325324972 in words is "three hundred ninety-four trillion, seven hundred seventy-eight billion, three hundred twenty-five million, three hundred twenty-four thousand, nine hundred seventy-two".