428502828258 has 18 divisors (see below), whose sum is σ = 928428811947. Its totient is φ = 142833350340.

The previous prime is 428502828217. The next prime is 428502828263. The reversal of 428502828258 is 852828205824.

It is a happy number.

428502828258 is a `hidden beast` number, since 4 + 2 + 8 + 502 + 8 + 2 + 82 + 58 = 666.

It can be written as a sum of positive squares in only one way, i.e., 214251414129 + 214251414129 = 462873^2 + 462873^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=462873.

It is a super-2 number, since 2×428502828258² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2700093 + ... + 2854383.

Almost surely, 2^428502828258 is an apocalyptic number.

428502828258 is an abundant number, since it is smaller than the sum of its proper divisors (499925983689).

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

428502828258 is an frugal number, since it uses more digits than its factorization.

428502828258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308590 (or 154296 counting only the distinct ones).

The product of its (nonzero) digits is 6553600, while the sum is 54.

The spelling of 428502828258 in words is "four hundred twenty-eight billion, five hundred two million, eight hundred twenty-eight thousand, two hundred fifty-eight".