670809924 has 60 divisors (see below), whose sum is σ = 1782430188. Its totient is φ = 219931200.

The previous prime is 670809869. The next prime is 670809947. The reversal of 670809924 is 429908076.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 143280900 + 527529024 = 11970^2 + 22968^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 670809924.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2794 + ... + 36734.

Almost surely, 2^670809924 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 670809924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (891215094).

670809924 is an abundant number, since it is smaller than the sum of its proper divisors (1111620264).

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

670809924 is a wasteful number, since it uses less digits than its factorization.

670809924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34018 (or 34007 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 670809924 is about 25899.9985328185. The cubic root of 670809924 is about 875.3864628633.

The spelling of 670809924 in words is "six hundred seventy million, eight hundred nine thousand, nine hundred twenty-four".