428615918872 has 16 divisors (see below), whose sum is σ = 808300254240. Its totient is φ = 213069184416.

The previous prime is 428615918837. The next prime is 428615918879. The reversal of 428615918872 is 278819516824.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 428615918872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428615918879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154845408 + ... + 154848175.

It is an arithmetic number, because the mean of its divisors is an integer number (50518765890).

Almost surely, 2^428615918872 is an apocalyptic number.

It is an amenable number.

428615918872 is a deficient number, since it is larger than the sum of its proper divisors (379684335368).

428615918872 is a wasteful number, since it uses less digits than its factorization.

428615918872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309693762 (or 309693758 counting only the distinct ones).

The product of its digits is 15482880, while the sum is 61.

The spelling of 428615918872 in words is "four hundred twenty-eight billion, six hundred fifteen million, nine hundred eighteen thousand, eight hundred seventy-two".