1223712000 has 432 divisors, whose sum is σ = 5040602112. Its totient is φ = 279244800.

The previous prime is 1223711977. The next prime is 1223712019. The reversal of 1223712000 is 2173221.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2015697 + ... + 2016303.

Almost surely, 2^1223712000 is an apocalyptic number.

1223712000 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 1223712000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2520301056).

1223712000 is an abundant number, since it is smaller than the sum of its proper divisors (3816890112).

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

1223712000 is an equidigital number, since it uses as much as digits as its factorization.

1223712000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651 (or 624 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 1223712000 is about 34981.5951608842. The cubic root of 1223712000 is about 1069.6123439218.

Adding to 1223712000 its reverse (2173221), we get a palindrome (1225885221).

The spelling of 1223712000 in words is "one billion, two hundred twenty-three million, seven hundred twelve thousand".