8427208428 has 18 divisors (see below), whose sum is σ = 21302110284. Its totient is φ = 2809069464.

The previous prime is 8427208381. The next prime is 8427208457. The reversal of 8427208428 is 8248027248.

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 117044526 + ... + 117044597.

Almost surely, 2^8427208428 is an apocalyptic number.

It is an amenable number.

8427208428 is an abundant number, since it is smaller than the sum of its proper divisors (12874901856).

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

8427208428 is a wasteful number, since it uses less digits than its factorization.

8427208428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234089133 (or 234089128 counting only the distinct ones).

The product of its (nonzero) digits is 458752, while the sum is 45.

The square root of 8427208428 is about 91799.8280390546. The cubic root of 8427208428 is about 2034.9851534795.

The spelling of 8427208428 in words is "eight billion, four hundred twenty-seven million, two hundred eight thousand, four hundred twenty-eight".