428316660 has 168 divisors, whose sum is σ = 1396460520. Its totient is φ = 110170368.

The previous prime is 428316653. The next prime is 428316673. The reversal of 428316660 is 66613824.

It can be written as a sum of positive squares in 4 ways, for example, as 571536 + 427745124 = 756^2 + 20682^2 .

It is a super-2 number, since 2×428316660² = 366910322467111200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 55 ways as a sum of consecutive naturals, for example, 422314 + ... + 423326.

It is an arithmetic number, because the mean of its divisors is an integer number (8312265).

Almost surely, 2^428316660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 428316660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (698230260).

428316660 is an abundant number, since it is smaller than the sum of its proper divisors (968143860).

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

428316660 is a wasteful number, since it uses less digits than its factorization.

428316660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069 (or 1052 counting only the distinct ones).

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

The square root of 428316660 is about 20695.8126199480. The cubic root of 428316660 is about 753.7980143172.

The spelling of 428316660 in words is "four hundred twenty-eight million, three hundred sixteen thousand, six hundred sixty".