67840223 has 24 divisors (see below), whose sum is σ = 77629440. Its totient is φ = 59202000.

The previous prime is 67840189. The next prime is 67840231. The reversal of 67840223 is 32204876.

It is not a de Polignac number, because 67840223 - 2¹² = 67836127 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67840223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67845223) 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 23 ways as a sum of consecutive naturals, for example, 449198 + ... + 449348.

It is an arithmetic number, because the mean of its divisors is an integer number (3234560).

Almost surely, 2^67840223 is an apocalyptic number.

67840223 is a deficient number, since it is larger than the sum of its proper divisors (9789217).

67840223 is a wasteful number, since it uses less digits than its factorization.

67840223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 67840223 is about 8236.5176500752. The cubic root of 67840223 is about 407.8455758506.

The spelling of 67840223 in words is "sixty-seven million, eight hundred forty thousand, two hundred twenty-three".