68225220 has 96 divisors (see below), whose sum is σ = 242592000. Its totient is φ = 15593472.

The previous prime is 68225173. The next prime is 68225221. The reversal of 68225220 is 2252286.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (68225221) 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 31 ways as a sum of consecutive naturals, for example, 5245 + ... + 12804.

It is an arithmetic number, because the mean of its divisors is an integer number (2527000).

Almost surely, 2^68225220 is an apocalyptic number.

68225220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68225220 is an abundant number, since it is smaller than the sum of its proper divisors (174366780).

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

68225220 is a wasteful number, since it uses less digits than its factorization.

68225220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18074 (or 18066 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 68225220 is about 8259.8559309470. The cubic root of 68225220 is about 408.6156363353.

The spelling of 68225220 in words is "sixty-eight million, two hundred twenty-five thousand, two hundred twenty".