64044220 has 24 divisors (see below), whose sum is σ = 134646624. Its totient is φ = 25588416.

The previous prime is 64044217. The next prime is 64044229. The reversal of 64044220 is 2244046.

It is a junction number, because it is equal to n+sod(n) for n = 64044191 and 64044200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64044229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27834 + ... + 30046.

It is an arithmetic number, because the mean of its divisors is an integer number (5610276).

Almost surely, 2^64044220 is an apocalyptic number.

It is an amenable number.

64044220 is an abundant number, since it is smaller than the sum of its proper divisors (70602404).

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

64044220 is a wasteful number, since it uses less digits than its factorization.

64044220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3669 (or 3667 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 64044220 is about 8002.7632727702. The cubic root of 64044220 is about 400.0921037906.

Adding to 64044220 its reverse (2244046), we get a palindrome (66288266).

The spelling of 64044220 in words is "sixty-four million, forty-four thousand, two hundred twenty".