1220813282 has 32 divisors (see below), whose sum is σ = 2094915312. Its totient is φ = 528574464.

The previous prime is 1220813257. The next prime is 1220813287. The reversal of 1220813282 is 2823180221.

It can be written as a sum of positive squares in 8 ways, for example, as 593360881 + 627452401 = 24359^2 + 25049^2 .

It is a super-2 number, since 2×1220813282² = 2980770139015223048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1220813287) 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 15 ways as a sum of consecutive naturals, for example, 135758 + ... + 144470.

Almost surely, 2^1220813282 is an apocalyptic number.

1220813282 is a deficient number, since it is larger than the sum of its proper divisors (874102030).

1220813282 is a wasteful number, since it uses less digits than its factorization.

1220813282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9062.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 1220813282 is about 34940.1385515284. The cubic root of 1220813282 is about 1068.7671134726.

The spelling of 1220813282 in words is "one billion, two hundred twenty million, eight hundred thirteen thousand, two hundred eighty-two".