428013666 has 16 divisors (see below), whose sum is σ = 951141600. Its totient is φ = 142671204.

The previous prime is 428013661. The next prime is 428013667. The reversal of 428013666 is 666310824.

It is a self number, because there is not a number n which added to its sum of digits gives 428013666.

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 7 ways as a sum of consecutive naturals, for example, 3963036 + ... + 3963143.

It is an arithmetic number, because the mean of its divisors is an integer number (59446350).

Almost surely, 2^428013666 is an apocalyptic number.

428013666 is an abundant number, since it is smaller than the sum of its proper divisors (523127934).

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

428013666 is a wasteful number, since it uses less digits than its factorization.

428013666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7926190 (or 7926184 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 428013666 is about 20688.4911484622. The cubic root of 428013666 is about 753.6202251763.

The spelling of 428013666 in words is "four hundred twenty-eight million, thirteen thousand, six hundred sixty-six".