68220258 has 16 divisors (see below), whose sum is σ = 136849440. Its totient is φ = 22671936.

The previous prime is 68220253. The next prime is 68220259. The reversal of 68220258 is 85202286.

It is not an unprimeable number, because it can be changed into a prime (68220253) 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 7 ways as a sum of consecutive naturals, for example, 14848 + ... + 18891.

It is an arithmetic number, because the mean of its divisors is an integer number (8553090).

Almost surely, 2^68220258 is an apocalyptic number.

68220258 is an abundant number, since it is smaller than the sum of its proper divisors (68629182).

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

68220258 is a wasteful number, since it uses less digits than its factorization.

68220258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34081.

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 68220258 is about 8259.5555570503. Note that the first 5 decimals coincide. The cubic root of 68220258 is about 408.6057299305.

The spelling of 68220258 in words is "sixty-eight million, two hundred twenty thousand, two hundred fifty-eight".