67305812 has 36 divisors (see below), whose sum is σ = 140733684. Its totient is φ = 28062720.

The previous prime is 67305787. The next prime is 67305827. The reversal of 67305812 is 21850376.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 60155536 + 7150276 = 7756^2 + 2674^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2612 + ... + 11892.

It is an arithmetic number, because the mean of its divisors is an integer number (3909269).

Almost surely, 2^67305812 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 67305812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70366842).

67305812 is an abundant number, since it is smaller than the sum of its proper divisors (73427872).

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

67305812 is a wasteful number, since it uses less digits than its factorization.

67305812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9336 (or 9327 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 67305812 is about 8204.0119453838. The cubic root of 67305812 is about 406.7718175939.

The spelling of 67305812 in words is "sixty-seven million, three hundred five thousand, eight hundred twelve".