1100320420 has 12 divisors (see below), whose sum is σ = 2310672924. Its totient is φ = 440128160.

The previous prime is 1100320409. The next prime is 1100320423. The reversal of 1100320420 is 240230011.

It can be written as a sum of positive squares in 2 ways, for example, as 420988324 + 679332096 = 20518^2 + 26064^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1100320420.

It is not an unprimeable number, because it can be changed into a prime (1100320423) 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, 27507991 + ... + 27508030.

It is an arithmetic number, because the mean of its divisors is an integer number (192556077).

Almost surely, 2^1100320420 is an apocalyptic number.

1100320420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1100320420 is an abundant number, since it is smaller than the sum of its proper divisors (1210352504).

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

1100320420 is a wasteful number, since it uses less digits than its factorization.

1100320420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55016030 (or 55016028 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1100320420 is about 33171.0780650856. The cubic root of 1100320420 is about 1032.3803369969.

Adding to 1100320420 its reverse (240230011), we get a palindrome (1340550431).

The spelling of 1100320420 in words is "one billion, one hundred million, three hundred twenty thousand, four hundred twenty".