670969728 has 192 divisors, whose sum is σ = 2268892080. Its totient is φ = 187637760.

The previous prime is 670969727. The next prime is 670969757. The reversal of 670969728 is 827969076.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670969727) 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 23 ways as a sum of consecutive naturals, for example, 162700 + ... + 166772.

Almost surely, 2^670969728 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 670969728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1134446040).

670969728 is an abundant number, since it is smaller than the sum of its proper divisors (1597922352).

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

670969728 is a wasteful number, since it uses less digits than its factorization.

670969728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4117 (or 4102 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 54.

The square root of 670969728 is about 25903.0833685876. The cubic root of 670969728 is about 875.4559704572.

The spelling of 670969728 in words is "six hundred seventy million, nine hundred sixty-nine thousand, seven hundred twenty-eight".