1223209200 has 120 divisors (see below), whose sum is σ = 3937732096. Its totient is φ = 324576000.

The previous prime is 1223209193. The next prime is 1223209201. The reversal of 1223209200 is 29023221.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223209201) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 250785 + ... + 255615.

Almost surely, 2^1223209200 is an apocalyptic number.

1223209200 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 1223209200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1968866048).

1223209200 is an abundant number, since it is smaller than the sum of its proper divisors (2714522896).

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

1223209200 is a wasteful number, since it uses less digits than its factorization.

1223209200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5063 (or 5052 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1223209200 is about 34974.4077862657. The cubic root of 1223209200 is about 1069.4658293932.

The spelling of 1223209200 in words is "one billion, two hundred twenty-three million, two hundred nine thousand, two hundred".