64220 has 36 divisors (see below), whose sum is σ = 153720. Its totient is φ = 22464.

The previous prime is 64217. The next prime is 64223. The reversal of 64220 is 2246.

It is an interprime number because it is at equal distance from previous prime (64217) and next prime (64223).

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 64195 and 64204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64223) 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 11 ways as a sum of consecutive naturals, for example, 3371 + ... + 3389.

It is an arithmetic number, because the mean of its divisors is an integer number (4270).

2⁶⁴²²⁰ 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 64220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76860).

64220 is an abundant number, since it is smaller than the sum of its proper divisors (89500).

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

64220 is a wasteful number, since it uses less digits than its factorization.

64220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54 (or 39 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 64220 is about 253.4166529650. The cubic root of 64220 is about 40.0457809160.

Adding to 64220 its reverse (2246), we get a palindrome (66466).

The spelling of 64220 in words is "sixty-four thousand, two hundred twenty".