428780873665 has 32 divisors (see below), whose sum is σ = 525047961600. Its totient is φ = 336059117760.

The previous prime is 428780873579. The next prime is 428780873699. The reversal of 428780873665 is 566378087824.

It is not a de Polignac number, because 428780873665 - 2¹⁹ = 428780349377 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 428780873597 and 428780873606.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 205846714 + ... + 205848796.

It is an arithmetic number, because the mean of its divisors is an integer number (16407748800).

Almost surely, 2^428780873665 is an apocalyptic number.

It is an amenable number.

428780873665 is a deficient number, since it is larger than the sum of its proper divisors (96267087935).

428780873665 is a wasteful number, since it uses less digits than its factorization.

428780873665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4197.

The product of its (nonzero) digits is 108380160, while the sum is 64.

The spelling of 428780873665 in words is "four hundred twenty-eight billion, seven hundred eighty million, eight hundred seventy-three thousand, six hundred sixty-five".