4491228828 has 12 divisors (see below), whose sum is σ = 10479533960. Its totient is φ = 1497076272.

The previous prime is 4491228803. The next prime is 4491228829. The reversal of 4491228828 is 8288221944.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×4491228828² = 40342272770916507168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4491228829) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 187134523 + ... + 187134546.

Almost surely, 2^4491228828 is an apocalyptic number.

It is an amenable number.

4491228828 is an abundant number, since it is smaller than the sum of its proper divisors (5988305132).

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

4491228828 is a wasteful number, since it uses less digits than its factorization.

4491228828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374269076 (or 374269074 counting only the distinct ones).

The product of its digits is 589824, while the sum is 48.

The square root of 4491228828 is about 67016.6309806752. The cubic root of 4491228828 is about 1649.8902685520.

The spelling of 4491228828 in words is "four billion, four hundred ninety-one million, two hundred twenty-eight thousand, eight hundred twenty-eight".