1200324420 has 240 divisors, whose sum is σ = 3893218560. Its totient is φ = 309464064.

The previous prime is 1200324409. The next prime is 1200324427. The reversal of 1200324420 is 244230021.

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

It is a junction number, because it is equal to n+sod(n) for n = 1200324393 and 1200324402.

It is not an unprimeable number, because it can be changed into a prime (1200324427) 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 79 ways as a sum of consecutive naturals, for example, 10622284 + ... + 10622396.

It is an arithmetic number, because the mean of its divisors is an integer number (16221744).

Almost surely, 2^1200324420 is an apocalyptic number.

1200324420 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 1200324420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1946609280).

1200324420 is an abundant number, since it is smaller than the sum of its proper divisors (2692894140).

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

1200324420 is a wasteful number, since it uses less digits than its factorization.

1200324420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296 (or 285 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 1200324420 is about 34645.6984342934. The cubic root of 1200324420 is about 1062.7543238021.

Adding to 1200324420 its reverse (244230021), we get a palindrome (1444554441).

The spelling of 1200324420 in words is "one billion, two hundred million, three hundred twenty-four thousand, four hundred twenty".