1229630220 has 480 divisors, whose sum is σ = 5008819200. Its totient is φ = 245223936.

The previous prime is 1229630191. The next prime is 1229630243. The reversal of 1229630220 is 220369221.

1229630220 is a `hidden beast` number, since 1 + 2 + 2 + 9 + 630 + 2 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 2800761 + ... + 2801199.

It is an arithmetic number, because the mean of its divisors is an integer number (10435040).

Almost surely, 2^1229630220 is an apocalyptic number.

1229630220 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 1229630220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2504409600).

1229630220 is an abundant number, since it is smaller than the sum of its proper divisors (3779188980).

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

1229630220 is a wasteful number, since it uses less digits than its factorization.

1229630220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499 (or 488 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1229630220 is about 35066.0836136572. The cubic root of 1229630220 is about 1071.3338883187. Note that the first 3 decimals are identical.

Adding to 1229630220 its reverse (220369221), we get a palindrome (1449999441).

The spelling of 1229630220 in words is "one billion, two hundred twenty-nine million, six hundred thirty thousand, two hundred twenty".