68250220 has 72 divisors (see below), whose sum is σ = 153144432. Its totient is φ = 25534080.

The previous prime is 68250191. The next prime is 68250293. The reversal of 68250220 is 2205286.

It is an unprimeable number.

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, 1018627 + ... + 1018693.

It is an arithmetic number, because the mean of its divisors is an integer number (2127006).

Almost surely, 2^68250220 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 68250220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76572216).

68250220 is an abundant number, since it is smaller than the sum of its proper divisors (84894212).

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

68250220 is a wasteful number, since it uses less digits than its factorization.

68250220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191 (or 158 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 68250220 is about 8261.3691359241. The cubic root of 68250220 is about 408.6655403806.

The spelling of 68250220 in words is "sixty-eight million, two hundred fifty thousand, two hundred twenty".