1223023236 has 72 divisors (see below), whose sum is σ = 3042172224. Its totient is φ = 382328640.

The previous prime is 1223023201. The next prime is 1223023247. The reversal of 1223023236 is 6323203221.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 444826 + ... + 447566.

It is an arithmetic number, because the mean of its divisors is an integer number (42252392).

Almost surely, 2^1223023236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223023236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1521086112).

1223023236 is an abundant number, since it is smaller than the sum of its proper divisors (1819148988).

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

1223023236 is a wasteful number, since it uses less digits than its factorization.

1223023236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2889 (or 2868 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 1223023236 is about 34971.7491126766. The cubic root of 1223023236 is about 1069.4116298272.

Adding to 1223023236 its reverse (6323203221), we get a palindrome (7546226457).

The spelling of 1223023236 in words is "one billion, two hundred twenty-three million, twenty-three thousand, two hundred thirty-six".