68208220 has 24 divisors (see below), whose sum is σ = 144580464. Its totient is φ = 27027456.

The previous prime is 68208193. The next prime is 68208227. The reversal of 68208220 is 2280286.

It is a happy number.

It is a super-2 number, since 2×68208220² = 9304722551136800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68208227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13797 + ... + 18076.

It is an arithmetic number, because the mean of its divisors is an integer number (6024186).

Almost surely, 2^68208220 is an apocalyptic number.

It is an amenable number.

68208220 is an abundant number, since it is smaller than the sum of its proper divisors (76372244).

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

68208220 is a wasteful number, since it uses less digits than its factorization.

68208220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31989 (or 31987 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 68208220 is about 8258.8267931953. The cubic root of 68208220 is about 408.5816946206.

The spelling of 68208220 in words is "sixty-eight million, two hundred eight thousand, two hundred twenty".