1220403200 has 168 divisors, whose sum is σ = 3108182760. Its totient is φ = 475136000.

The previous prime is 1220403187. The next prime is 1220403203. The reversal of 1220403200 is 23040221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220403203) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 12083150 + ... + 12083250.

Almost surely, 2^1220403200 is an apocalyptic number.

1220403200 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 1220403200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1554091380).

1220403200 is an abundant number, since it is smaller than the sum of its proper divisors (1887779560).

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

1220403200 is an equidigital number, since it uses as much as digits as its factorization.

1220403200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 1220403200 is about 34934.2697075522. The cubic root of 1220403200 is about 1068.6474306226.

Adding to 1220403200 its reverse (23040221), we get a palindrome (1243443421).

The spelling of 1220403200 in words is "one billion, two hundred twenty million, four hundred three thousand, two hundred".