68222220 has 72 divisors (see below), whose sum is σ = 209988912. Its totient is φ = 16536960.

The previous prime is 68222213. The next prime is 68222221. The reversal of 68222220 is 2222286.

It is not an unprimeable number, because it can be changed into a prime (68222221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2562 + ... + 11958.

Almost surely, 2^68222220 is an apocalyptic number.

68222220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68222220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104994456).

68222220 is an abundant number, since it is smaller than the sum of its proper divisors (141766692).

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

68222220 is a wasteful number, since it uses less digits than its factorization.

68222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9431 (or 9418 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 68222220 is about 8259.6743277202. The cubic root of 68222220 is about 408.6096470307.

The spelling of 68222220 in words is "sixty-eight million, two hundred twenty-two thousand, two hundred twenty".