67218228 has 192 divisors, whose sum is σ = 222566400. Its totient is φ = 17038080.

The previous prime is 67218211. The next prime is 67218247. The reversal of 67218228 is 82281276.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 67218192 and 67218201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 490576 + ... + 490712.

It is an arithmetic number, because the mean of its divisors is an integer number (1159200).

Almost surely, 2^67218228 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 67218228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111283200).

67218228 is an abundant number, since it is smaller than the sum of its proper divisors (155348172).

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

67218228 is a wasteful number, since it uses less digits than its factorization.

67218228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227 (or 219 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 67218228 is about 8198.6723315425. The cubic root of 67218228 is about 406.5952990710.

It can be divided in two parts, 672182 and 28, that multiplied together give a cube (18821096 = 266³).

The spelling of 67218228 in words is "sixty-seven million, two hundred eighteen thousand, two hundred twenty-eight".