428887772868 has 48 divisors (see below), whose sum is σ = 1004701501440. Its totient is φ = 142396682400.

The previous prime is 428887772851. The next prime is 428887772899. The reversal of 428887772868 is 868277788824.

It is a self number, because there is not a number n which added to its sum of digits gives 428887772868.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13678513 + ... + 13709831.

It is an arithmetic number, because the mean of its divisors is an integer number (20931281280).

Almost surely, 2^428887772868 is an apocalyptic number.

It is an amenable number.

428887772868 is an abundant number, since it is smaller than the sum of its proper divisors (575813728572).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428887772868 is a wasteful number, since it uses less digits than its factorization.

428887772868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35808 (or 35806 counting only the distinct ones).

The product of its digits is 1078984704, while the sum is 75.

The spelling of 428887772868 in words is "four hundred twenty-eight billion, eight hundred eighty-seven million, seven hundred seventy-two thousand, eight hundred sixty-eight".