428923220008 has 8 divisors (see below), whose sum is σ = 804231037530. Its totient is φ = 214461610000.

The previous prime is 428923219981. The next prime is 428923220009. The reversal of 428923220008 is 800022329824.

It can be written as a sum of positive squares in only one way, i.e., 214463462404 + 214459757604 = 463102^2 + 463098^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (428923220009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26807701243 + ... + 26807701258.

Almost surely, 2^428923220008 is an apocalyptic number.

It is an amenable number.

428923220008 is a deficient number, since it is larger than the sum of its proper divisors (375307817522).

428923220008 is a wasteful number, since it uses less digits than its factorization.

428923220008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53615402507 (or 53615402503 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The spelling of 428923220008 in words is "four hundred twenty-eight billion, nine hundred twenty-three million, two hundred twenty thousand, eight".