1220302240 has 24 divisors (see below), whose sum is σ = 2882964420. Its totient is φ = 488120832.

The previous prime is 1220302231. The next prime is 1220302243. The reversal of 1220302240 is 422030221.

It can be written as a sum of positive squares in 2 ways, for example, as 1144333584 + 75968656 = 33828^2 + 8716^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (1220302243) 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 3 ways as a sum of consecutive naturals, for example, 3813285 + ... + 3813604.

Almost surely, 2^1220302240 is an apocalyptic number.

1220302240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220302240 is an abundant number, since it is smaller than the sum of its proper divisors (1662662180).

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

1220302240 is an equidigital number, since it uses as much as digits as its factorization.

1220302240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7626904 (or 7626896 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 1220302240 is about 34932.8246782306. The cubic root of 1220302240 is about 1068.6179612309.

Adding to 1220302240 its reverse (422030221), we get a palindrome (1642332461).

The spelling of 1220302240 in words is "one billion, two hundred twenty million, three hundred two thousand, two hundred forty".