397686768842 has 8 divisors (see below), whose sum is σ = 650760167232. Its totient is φ = 180766713100.

The previous prime is 397686768827. The next prime is 397686768877. The reversal of 397686768842 is 248867686793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×397686768842² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 397686768842.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9038335634 + ... + 9038335677.

It is an arithmetic number, because the mean of its divisors is an integer number (81345020904).

Almost surely, 2^397686768842 is an apocalyptic number.

397686768842 is a deficient number, since it is larger than the sum of its proper divisors (253073398390).

397686768842 is a wasteful number, since it uses less digits than its factorization.

397686768842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18076671324.

The product of its digits is 1170505728, while the sum is 74.

The spelling of 397686768842 in words is "three hundred ninety-seven billion, six hundred eighty-six million, seven hundred sixty-eight thousand, eight hundred forty-two".