1220032044 has 144 divisors (see below), whose sum is σ = 3987599616. Its totient is φ = 316872000.

The previous prime is 1220031949. The next prime is 1220032057. The reversal of 1220032044 is 4402300221.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent 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 47 ways as a sum of consecutive naturals, for example, 66694 + ... + 82994.

It is an arithmetic number, because the mean of its divisors is an integer number (27691664).

Almost surely, 2^1220032044 is an apocalyptic number.

1220032044 is a gapful number since it is divisible by the number (14) 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 1220032044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1993799808).

1220032044 is an abundant number, since it is smaller than the sum of its proper divisors (2767567572).

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

1220032044 is a wasteful number, since it uses less digits than its factorization.

1220032044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16338 (or 16324 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 1220032044 is about 34928.9570986596. The cubic root of 1220032044 is about 1068.5390852491.

Adding to 1220032044 its reverse (4402300221), we get a palindrome (5622332265).

It can be divided in two parts, 12200 and 32044, that added together give a palindrome (44244).

The spelling of 1220032044 in words is "one billion, two hundred twenty million, thirty-two thousand, forty-four".