1232222220 has 240 divisors, whose sum is σ = 4142765088. Its totient is φ = 305510400.

The previous prime is 1232222179. The next prime is 1232222221. The reversal of 1232222220 is 222222321.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1232222193 and 1232222202.

It is not an unprimeable number, because it can be changed into a prime (1232222221) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2781319 + ... + 2781761.

Almost surely, 2^1232222220 is an apocalyptic number.

1232222220 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 1232222220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2071382544).

1232222220 is an abundant number, since it is smaller than the sum of its proper divisors (2910542868).

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

1232222220 is a wasteful number, since it uses less digits than its factorization.

1232222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582 (or 571 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 1232222220 is about 35103.0229467492. The cubic root of 1232222220 is about 1072.0861330417.

Adding to 1232222220 its reverse (222222321), we get a palindrome (1454444541).

The spelling of 1232222220 in words is "one billion, two hundred thirty-two million, two hundred twenty-two thousand, two hundred twenty".