428672823866 has 8 divisors (see below), whose sum is σ = 734867698080. Its totient is φ = 183716924508.

The previous prime is 428672823851. The next prime is 428672823893. The reversal of 428672823866 is 668328276824.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 428672823799 and 428672823808.

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, 15309743696 + ... + 15309743723.

It is an arithmetic number, because the mean of its divisors is an integer number (91858462260).

Almost surely, 2^428672823866 is an apocalyptic number.

428672823866 is a deficient number, since it is larger than the sum of its proper divisors (306194874214).

428672823866 is a wasteful number, since it uses less digits than its factorization.

428672823866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30619487428.

The product of its digits is 74317824, while the sum is 62.

The spelling of 428672823866 in words is "four hundred twenty-eight billion, six hundred seventy-two million, eight hundred twenty-three thousand, eight hundred sixty-six".