8240220428 has 48 divisors (see below), whose sum is σ = 17130355200. Its totient is φ = 3426050880.

The previous prime is 8240220389. The next prime is 8240220431.

It is a happy number.

8240220428 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 8240220394 and 8240220403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145700 + ... + 194187.

It is an arithmetic number, because the mean of its divisors is an integer number (356882400).

Almost surely, 2^8240220428 is an apocalyptic number.

It is an amenable number.

8240220428 is an abundant number, since it is smaller than the sum of its proper divisors (8890134772).

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

8240220428 is a wasteful number, since it uses less digits than its factorization.

8240220428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339950 (or 339948 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 32.

The square root of 8240220428 is about 90775.6598874390. The cubic root of 8240220428 is about 2019.8212785055.

The spelling of 8240220428 in words is "eight billion, two hundred forty million, two hundred twenty thousand, four hundred twenty-eight".