428013668 has 12 divisors (see below), whose sum is σ = 774852540. Its totient is φ = 206627232.

The previous prime is 428013667. The next prime is 428013689. The reversal of 428013668 is 866310824.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 349017124 + 78996544 = 18682^2 + 8888^2 .

It is not an unprimeable number, because it can be changed into a prime (428013661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1844771 + ... + 1845002.

It is an arithmetic number, because the mean of its divisors is an integer number (64571045).

Almost surely, 2^428013668 is an apocalyptic number.

It is an amenable number.

428013668 is a deficient number, since it is larger than the sum of its proper divisors (346838872).

428013668 is a wasteful number, since it uses less digits than its factorization.

428013668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3689806 (or 3689804 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 428013668 is about 20688.4911967983. The cubic root of 428013668 is about 753.6202263501.

The spelling of 428013668 in words is "four hundred twenty-eight million, thirteen thousand, six hundred sixty-eight".