1220044040 has 64 divisors (see below), whose sum is σ = 2786238000. Its totient is φ = 480747520.

The previous prime is 1220044037. The next prime is 1220044057. The reversal of 1220044040 is 404400221.

It can be written as a sum of positive squares in 8 ways, for example, as 64995844 + 1155048196 = 8062^2 + 33986^2 .

It is an unprimeable number.

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, 1384400 + ... + 1385280.

Almost surely, 2^1220044040 is an apocalyptic number.

1220044040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220044040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1393119000).

1220044040 is an abundant number, since it is smaller than the sum of its proper divisors (1566193960).

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

1220044040 is a wasteful number, since it uses less digits than its factorization.

1220044040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370 (or 1366 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 1220044040 is about 34929.1288182228. The cubic root of 1220044040 is about 1068.5425873847.

Adding to 1220044040 its reverse (404400221), we get a palindrome (1624444261).

The spelling of 1220044040 in words is "one billion, two hundred twenty million, forty-four thousand, forty".