1223212764 has 48 divisors (see below), whose sum is σ = 3031868448. Its totient is φ = 382507008.

The previous prime is 1223212763. The next prime is 1223212801. The reversal of 1223212764 is 4672123221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223212763) 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 15 ways as a sum of consecutive naturals, for example, 54274 + ... + 73430.

It is an arithmetic number, because the mean of its divisors is an integer number (63163926).

Almost surely, 2^1223212764 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 1223212764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1515934224).

1223212764 is an abundant number, since it is smaller than the sum of its proper divisors (1808655684).

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

1223212764 is a wasteful number, since it uses less digits than its factorization.

1223212764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19494 (or 19492 counting only the distinct ones).

The product of its digits is 8064, while the sum is 30.

The square root of 1223212764 is about 34974.4587377703. The cubic root of 1223212764 is about 1069.4668680742.

Adding to 1223212764 its reverse (4672123221), we get a palindrome (5895335985).

The spelling of 1223212764 in words is "one billion, two hundred twenty-three million, two hundred twelve thousand, seven hundred sixty-four".