67188228 has 12 divisors (see below), whose sum is σ = 156772560. Its totient is φ = 22396072.

The previous prime is 67188227. The next prime is 67188269. The reversal of 67188228 is 82288176.

67188228 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

67188228 is strictly pandigital in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 67188228.

It is not an unprimeable number, because it can be changed into a prime (67188227) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2799498 + ... + 2799521.

It is an arithmetic number, because the mean of its divisors is an integer number (13064380).

Almost surely, 2^67188228 is an apocalyptic number.

It is an amenable number.

67188228 is an abundant number, since it is smaller than the sum of its proper divisors (89584332).

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

67188228 is a wasteful number, since it uses less digits than its factorization.

67188228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5599026 (or 5599024 counting only the distinct ones).

The product of its digits is 86016, while the sum is 42.

The square root of 67188228 is about 8196.8425628409. The cubic root of 67188228 is about 406.5348012246.

The spelling of 67188228 in words is "sixty-seven million, one hundred eighty-eight thousand, two hundred twenty-eight".