164224420 has 48 divisors (see below), whose sum is σ = 370355328. Its totient is φ = 60945920.

The previous prime is 164224399. The next prime is 164224433. The reversal of 164224420 is 24422461.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20739 + ... + 27541.

It is an arithmetic number, because the mean of its divisors is an integer number (7715736).

Almost surely, 2^164224420 is an apocalyptic number.

164224420 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 164224420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185177664).

164224420 is an abundant number, since it is smaller than the sum of its proper divisors (206130908).

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

164224420 is a wasteful number, since it uses less digits than its factorization.

164224420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6900 (or 6898 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 164224420 is about 12815.0076082693. The cubic root of 164224420 is about 547.6199302197.

Adding to 164224420 its reverse (24422461), we get a palindrome (188646881).

It can be divided in two parts, 1642 and 24420, that added together give a palindrome (26062).

The spelling of 164224420 in words is "one hundred sixty-four million, two hundred twenty-four thousand, four hundred twenty".