1220202450 has 144 divisors (see below), whose sum is σ = 3358660032. Its totient is φ = 317520000.

The previous prime is 1220202449. The next prime is 1220202457. The reversal of 1220202450 is 542020221.

1220202450 is a `hidden beast` number, since 12 + 2 + 0 + 202 + 450 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220202457) 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 71 ways as a sum of consecutive naturals, for example, 5782845 + ... + 5783055.

It is an arithmetic number, because the mean of its divisors is an integer number (23324028).

Almost surely, 2^1220202450 is an apocalyptic number.

1220202450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220202450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1679330016).

1220202450 is an abundant number, since it is smaller than the sum of its proper divisors (2138457582).

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

1220202450 is a wasteful number, since it uses less digits than its factorization.

1220202450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 1220202450 is about 34931.3963362474. The cubic root of 1220202450 is about 1068.5888317552.

Adding to 1220202450 its reverse (542020221), we get a palindrome (1762222671).

The spelling of 1220202450 in words is "one billion, two hundred twenty million, two hundred two thousand, four hundred fifty".