1220803600 has 45 divisors (see below), whose sum is σ = 2934660477. Its totient is φ = 488041920.

The previous prime is 1220803579. The next prime is 1220803631. The reversal of 1220803600 is 63080221.

The square root of 1220803600 is 34940.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 439489296 + 781314304 = 20964^2 + 27952^2 .

It is a super-2 number, since 2×1220803600² = 2980722859545920000, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 697927 + ... + 699673.

Almost surely, 2^1220803600 is an apocalyptic number.

1220803600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220803600 is the 34940-th square number.

It is an amenable number.

1220803600 is an abundant number, since it is smaller than the sum of its proper divisors (1713856877).

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

1220803600 is an frugal number, since it uses more digits than its factorization.

1220803600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3512 (or 1754 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The cubic root of 1220803600 is about 1068.7642880800.

Multiplying 1220803600 by its product of nonzero digits (576), we get a square (703182873600 = 838560²).

Adding to 1220803600 its reverse (63080221), we get a palindrome (1283883821).

The spelling of 1220803600 in words is "one billion, two hundred twenty million, eight hundred three thousand, six hundred".