428128850628 has 72 divisors (see below), whose sum is σ = 1100258606720. Its totient is φ = 140331476160.

The previous prime is 428128850603. The next prime is 428128850651. The reversal of 428128850628 is 826058821824.

428128850628 is a `hidden beast` number, since 4 + 2 + 8 + 1 + 2 + 8 + 8 + 5 + 0 + 628 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8581251 + ... + 8630997.

Almost surely, 2^428128850628 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 428128850628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (550129303360).

428128850628 is an abundant number, since it is smaller than the sum of its proper divisors (672129756092).

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

428128850628 is a wasteful number, since it uses less digits than its factorization.

428128850628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53737 (or 53732 counting only the distinct ones).

The product of its (nonzero) digits is 3932160, while the sum is 54.

The spelling of 428128850628 in words is "four hundred twenty-eight billion, one hundred twenty-eight million, eight hundred fifty thousand, six hundred twenty-eight".