122646220 has 48 divisors (see below), whose sum is σ = 269156160. Its totient is φ = 46884096.

The previous prime is 122646203. The next prime is 122646239. The reversal of 122646220 is 22646221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58714 + ... + 60766.

It is an arithmetic number, because the mean of its divisors is an integer number (5607420).

Almost surely, 2^122646220 is an apocalyptic number.

122646220 is a gapful number since it is divisible by the number (10) 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 122646220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134578080).

122646220 is an abundant number, since it is smaller than the sum of its proper divisors (146509940).

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

122646220 is a wasteful number, since it uses less digits than its factorization.

122646220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2194 (or 2192 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 122646220 is about 11074.5753868941. The cubic root of 122646220 is about 496.8417191954.

Subtracting from 122646220 its reverse (22646221), we obtain a palindrome (99999999).

The spelling of 122646220 in words is "one hundred twenty-two million, six hundred forty-six thousand, two hundred twenty".