1233223420 has 144 divisors (see below), whose sum is σ = 3137732640. Its totient is φ = 403353600.

The previous prime is 1233223393. The next prime is 1233223423. The reversal of 1233223420 is 243223321.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1233223391 and 1233223400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1233223423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1523976 + ... + 1524784.

It is an arithmetic number, because the mean of its divisors is an integer number (21789810).

Almost surely, 2^1233223420 is an apocalyptic number.

1233223420 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 1233223420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1568866320).

1233223420 is an abundant number, since it is smaller than the sum of its proper divisors (1904509220).

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

1233223420 is a wasteful number, since it uses less digits than its factorization.

1233223420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896 (or 881 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 1233223420 is about 35117.2809311883. The cubic root of 1233223420 is about 1072.3764167366.

Adding to 1233223420 its reverse (243223321), we get a palindrome (1476446741).

Subtracting from 1233223420 its reverse (243223321), we obtain a palindrome (990000099).

The spelling of 1233223420 in words is "one billion, two hundred thirty-three million, two hundred twenty-three thousand, four hundred twenty".